If a normal chord at a poit t(ne 0) on t...

If a normal chord at a poit t(`ne` 0) on the parabola `y^(2)` = 9x subtends a right angle at its vertex, then t =

A

`sqrt(3)`

B

`sqrt(5)`

C

`pm sqrt(3)`

D

`pm sqrt(2)`

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The correct Answer is:

D

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