In a Delta ABC, angles A, B, C are in AP...

In a `Delta ABC`, angles A, B, C are in AP. If `f(x) = lim_(A to C) (sqrt(3 - 4 sin A sin C))/(|A-C|)`, then f'(x) is equal to ..........

A

1

B

2

C

3

D

4

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The correct Answer is:

A

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