The pre-order traversal of a binary search tree is given by…

GATE · 2017 · CS · Set 2 · Computer Science & IT

The pre-order traversal of a binary search tree is given by 12,8,6,2,7,9,10,16,15,19,17,20.

Then the post-order traversal of this tree is

  1. A.

    2, 6, 7, 8, 9, 10, 12, 15, 16, 17, 19, 20

  2. B.

    2, 7, 6, 10, 9, 8, 15, 17, 20, 19, 16, 12

  3. C.

    7, 2, 6, 8, 9, 10, 20, 17, 19, 15, 16, 12

  4. D.

    7, 6, 2, 10, 9, 8, 15, 16, 17, 20, 19, 12

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Correct answer: B

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