Can you please help me with this quiz program? : This is a java program for making a quiz and you have 10 questions and if you get one answer correct you will get 1 point however there is no negative marking and when I compile it it throws this: 'else' without 'if' error

    enter code here
    

 
    import java.io.*;
    import java.util.*;


    /**
    * Write a description of class program1 here.
    * 
    * @author (your name) 
    * @version (a version number or a date)
    */
    public class Project
    {
    public static void main(String[]args)
    {
        Scanner sc = new Scanner(System.in);
       char ans;
       int score=0;

    System.out.println("1.What was the first mouse created?");
    System.out.println("(a)Glass ");
    System.out.println("(b) Wood");
     System.out.println("(c) Steel");
         System.out.println("(d) Paper");
           System.out.print("Enter Your Choice => ");
             ans=sc.next().charAt(0) ;
             if(ans=='b')
       System.out.println("That's correct!");
         score+=1;
          else

             System.out.println("Sorry it is wrong...");




                   System.out.println("2. Who is the father of the 'Internet'?");
                        System.out.println("(a)Alan Peris ");
                    System.out.println("(c) Vint Cerf");
                      System.out.println("(d) Steve Lawrence");
                      System.out.print("Enter Your Choice => ");
             ans=sc.next().charAt(0) ;
            if(ans=='c')
                  System.out.println("That's correct!");
                 score+=1;
             else

            System.out.println("Sorry it is wrong...");




                            System.out.println("3.What search engine provides "instant answers" for certain types of queries?");
                      System.out.println("(a)Google ");
              System.out.println("(b) Yahoo");
                                  System.out.println("(c) Bing");
                     System.out.println("(d) Dogpile");
                 System.out.print("Enter Your Choice => ");
      ans=sc.next().charAt(0) ;
                    if(ans=='c')
                  System.out.println("That's correct!");
                 score+=1;
                 else

        System.out.println("Sorry it is wrong...");





                System.out.println("3.4K might be used synonymously with what acronym?");
            System.out.println("(a)UHD ");
             System.out.println("(b) VGA");
               System.out.println("(c) PCI");
           System.out.println("(d) HDR");
             System.out.print("Enter Your Choice => ");
            ans=sc.next().charAt(0) ;
             if(ans=='a')
      System.out.println("That's correct!");
        score+=1;
             else

                               System.out.println("Sorry it is wrong...");





       System.out.println("4. A zero day exploit is a type of what?");
                           System.out.println("(a) Malware ");
                  System.out.println("(b) Shareware");
     System.out.println("(c) Freeware");
           System.out.println("(d) Adware");
             System.out.print("Enter Your Choice => ");
          ans=sc.next().charAt(0) ;
             if(ans=='a')
           System.out.println("That's correct!");
                 score+=1;
              else

        System.out.println("Sorry it is wrong...");






        System.out.println("5.What adjective describes an image that only contains         shades of gray?");
              System.out.println("(a) Saturated ");
                  System.out.println("(b) Grayscale");
                   System.out.println("(c) Hueless");
        System.out.println("(d) Black and White");
            System.out.print("Enter Your Choice => ");
          ans=sc.next().charAt(0) ;
                 if(ans=='b')
               System.out.println("That's correct!");
             score+=1;
     else

       System.out.println("Sorry it is wrong...");


                    System.out.println("6.What does it mean if a device is erg               onomic?");
        System.out.println("(a) It is upgradeable");
                   System.out.println("(b) It is enviromentally friendly");
                        System.out.println("(c) It is compatible with multiple               platforms");
         System.out.println("(d) It is designed to be comfortable to use");
                    System.out.print("Enter Your Choice => ");
                 ans=sc.next().charAt(0) ;
                               if(ans=='d')
                    System.out.println("That's correct!");
         score+=1;
                       else

             System.out.println("Sorry it is wrong...");



           System.out.println("7. Which of the following can be synced with iCloud?");
        System.out.println("(a) Reminders ");
                      System.out.println("(b) Contacts");
                     System.out.println("(c) Calendar");
                            System.out.println("(d) Websites");
                    System.out.print("Enter Your Choice => ");
                     ans=sc.next().charAt(0) ;
                       if(ans=='d')
                      System.out.println("That's correct!");
                    score+=1;
              else

               System.out.println("Sorry it is wrong...");





                          System.out.println("8.What is the term "Wi-Fi" short for?");
                System.out.println("(a) Wireless Fidelity");
                      System.out.println("(b) Wireless Finder");
                       System.out.println("(c) Wireless Frequency Inte                      lligence");
                            System.out.println("(d) Nothing");
                       System.out.print("Enter Your Choice => ");
                       ans=sc.next().charAt(0) ;
                    if(ans=='d')
                 System.out.println("That's correct!");
         score+=1;
                       else

            System.out.println("Sorry it is wrong...");

                    System.out.println("9. What do keystrokes measure?");
                   System.out.println("(a) Login attempts");
                   System.out.println("(b) Secure socket connections");
                     System.out.println("(c) Keys pressed on a keyboard");
                   System.out.println("(d) Nothing");
       System.out.print("Enter Your Choice => ");
                  ans=sc.next().charAt(0) ;
                     if(ans=='c')
                   System.out.println("That's correct!");
                        score+=1;
                 else

         System.out.println("Sorry it is wrong...");




      System.out.println("10.The veronica search engine is used to search what service?");
           System.out.println("(a) Gopher");
        System.out.println("(b) Telnet");
    System.out.println("(c) BBS");
            System.out.println("(d) FTP");
                System.out.print("Enter Your Choice => ");
                 ans=sc.next().charAt(0) ;
               if(ans=='a')
            System.out.println("That's correct!");
           score+=1;
                         else

                        System.out.println("Sorry it is wrong...");

        System.out.println("Your total score is:"+score);
       }
               }
                 }




        

    



 