title: What are the two subtrees for C that makes it unbalanced?
body: <p>In the tree:</p>
  
  <pre><code>    A
     / \
    B   C &lt;-- Difference = 2
   /   /
  D   E
     /
    G
  </code></pre>
  
  <p>What are the two subtrees for node C that make it unbalanced??</p>