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If 2x^(2)+4xy-py^(2)+4x+qy+1=0 represent...

If `2x^(2)+4xy-py^(2)+4x+qy+1=0` represents a pair of mutually perpendicular lines then

A

`p=2, q=0, 4`

B

`p=2, q=0, -4`

C

`p=2, q=0, 8`

D

`p=2, q=0, -8`

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The correct Answer is:
C
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