Then the post-order traversal of this tree is:
A. 2,6,7,8,9,10,12,15,16,17,19,20
B. 2,7,6,10,9,8,15,17,20,19,16,12
C. 7,2,6,8,9,10,20,17,19,15,16,12
D. 7,6,2,10,9,8,15,16,17,20,19,12
Answer:B
Then the post-order traversal of this tree is:
A. 2,6,7,8,9,10,12,15,16,17,19,20 B. 2,7,6,10,9,8,15,17,20,19,16,12 C. 7,2,6,8,9,10,20,17,19,15,16,12 D. 7,6,2,10,9,8,15,16,17,20,19,12