The tangents at the points (at(1)^(2), 2...

The tangents at the points `(at_(1)^(2), 2at_(1)), (at_(2)^(2), 2at_(2))` on the parabola `y^(2)=4ax` are at right angles if

A

-1

B

-2

C

-3

D

-4

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The correct Answer is:

D

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