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The set of values of p for which the poi...

The set of values of p for which the points of extremum of the function, `f(x) = x^3 -3px^2 + 3 (p^2 -1)x + 1` lin in the interval `(-2,4)` is

A

`(-3,5)`

B

`(-3,3)`

C

`(-1,3)`

D

`(-1,4)`

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The correct Answer is:
C
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