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The equation 2x^2+4xy-py^2+4x+qy+1=0 wil...

The equation `2x^2+4xy-py^2+4x+qy+1=0` will represent two mutually perpendicular straight lines , if

A

`p=1` and `q=2` or 6

B

`p=2` and `q=0` or 6

C

`p=2` and `q=0` or 8

D

`p=-2` and `q=-2` or 8

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The correct Answer is:
C
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TARGET PUBLICATION-PAIR OF STRAIGHT LINES-CRITICAL THINKING
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