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☐ A
(Choose 1 answer)
Given a binary tree below. What is a result of pre-order traverse?
A. 4, 3, 7, 5, 1, 8, 6, 2
☐ C
B. 1, 3, 4, 5, 7, 2, 8.6
☐ D
C. 1, 3, 4, 5, 7, 2, 6, 8
D. 1, 3, 4, 7, 5, 2, 6, 8
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