inoeder traversal is given 1 2 3 4 5 6 7 8 9
in preorder traversal  root come fist , then left and then right.
see the option
  a.    1 6 3 2 7 8 4 9

1 is root at left there is 6 , sine  left child must be smaller than root

in this way none of options are satisfying this
   b.    6 7 3 8 1 9 2 7       6  is roor but 7 is greater
   c,    2 4 6 8 1 3 5 7
   d.    1 3 5 7 2 4 6 8

i think the is some fault in the question it should  post order to find
On Sun, Aug 7, 2011 at 11:38 AM, ankit sambyal <ankitsamb...@gmail.com>wrote:

> @coder : Cud u plz explain the approach for question 9 ??
>
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