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The length of the normal chord which sub...

The length of the normal chord which subtends an angle of `90^(@)` at the vertex of the parabola `y^(2)=4x` is

A

`6sqrt3" units"`

B

`7sqrt2" units"`

C

`8sqrt2" units"`

D

`9sqrt2" units"`

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The correct Answer is:
A
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