If the function f(x)=4x^(3)+ax^(2)+bx-1...

If the function `f(x)=4x^(3)+ax^(2)+bx-1` satisfies all the conditions of Rolle's theorem in `-(1)/(4) le x le 1` and if `f'((1)/(2))=0`, then the values of a and b are -

A

`a=2, b=3`

B

`a=1,b=-4`

C

`a=-1, b=4`

D

`a=-4, b=-1`

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The correct Answer is:

B

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