If fandg are differentiable functions su...

If `fandg` are differentiable functions such that `g'(a)=2andg(a)=band` if fog is an identify function, then `f'(b)` has the value equal to

A

2

B

`(2)/(3)`

C

`(1)/(2)`

D

None of these

Verified by Experts

The correct Answer is:

C

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