Retrieving xml nodes in c# using linq : i have xml like 

    <century>  
     <question>What is silvia</question>  
     <answer>silvia is artificial intelligence</answer>  
     <question>What is your name</question> 
      <answer>my name is RAMESH</answer> 
    </century>  

ihave multiple questions and answers.How to retrieve answer based on question using linq ?

Thanks advance