GATE | GATE CS 1997 | Question 30

A binary search tree contains the values 1, 2, 3, 4, 5, 6, 7, 8. The tree is traversed in pre-order and the values are printed out. Which of the following sequences is a valid output?
(A) 53124786
(B) 53126487
(C) 53241678
(D) 53124768

Answer: (D)


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