If the equation 12x^(2)+7xy-py^(2)-18x+q...

If the equation `12x^(2)+7xy-py^(2)-18x+qy+6=0` represents a pair of perpendicular lines then

A

(1,a)

B

(1, -a)

C

(0, a)

D

(0, 2a)

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The correct Answer is:

C

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