Add two lists onto another list which : <p>So I have two lists right now.</p>

<pre><code>list1 = ['A', 'B', 'C', 'D']
list2 = [1, 2, 3, 4]
</code></pre>

<p>How can I merge the lists together to make it look something like this:</p>

<pre><code>list3 = [['A', 1], ['B', 2], ['C', 3], ['D', 4]]
</code></pre>

<p>Basically I want to make a list inside a list.</p>

<p>I've been trying for loops but nothing seems to be working for me.</p>
