单选题：For an in-order threaded binary tree, if the post-order and in-o

For an in-order threaded binary tree, if the post-order and in-order traversal sequences are DFGEBCA and DBFEGAC respectively, the number of left threaded links and that of right threaded links are _. @[B](3)

A. 5 and 3
B. 4 and 4
C. 4 and 3
D. 3 and 5




A.5 and 3
B.4 and 4
C.4 and 3
D.3 and 5


答案：B