If the normals at two points P and Q of ...

If the normals at two points P and Q of a parabola `y^2 = 4ax` intersect at a third point R on the curve, then the product of ordinates of P and Q is

A

`4a^2`

B

`2a^2`

C

`-4a^2`

D

`8a^2`

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The correct Answer is:

D

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