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Let P(3 sec theta, 2 tan theta) and Q(3 ...

Let `P(3 sec theta, 2 tan theta) and Q(3 sec phi, 2 tan phi)` be two points on `(x^(2))/(9)- (y^(2))/(4)=1` such that `theta + phi = (pi)/(2), 0 lt theta, phi lt (pi)/(2)`. Then the ordinate of the point of intersection of the normals at P and Q is

A

`(13)/(2)`

B

`- (13)/(2)`

C

`(5)/(2)`

D

`- (5)/(2)`

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