Consider the following nested representation of binary trees indicates – McqOptions

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1.	Consider the following nested representation of binary trees indicates y and z are the left right subtrees, respectively, of node x. Note that y and z may be NULL or further nested. Which of the following represents a valid binary tree?
A.	(1(234)(567)
B.	(1 2(4 5 6 7))
C.	(1(2 3 NULL)(4 5))
D.	1((2 3 NULL)4 5 6)7)
Answer» B. (1 2(4 5 6 7))

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