If the sum of squares of the roots of eq...

If the sum of squares of the roots of equation `x^(2)- (sin alpha -2)x -(1 + sin alpha)= 0` is the least, then `alpha` is equal to

A

`pi//4`

B

`pi//3`

C

`pi//2`

D

`pi//6`

Verified by Experts

The correct Answer is:

C

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