If the equation \[12{{x}^{2}}+7xy-p{{y}^{2}}-18x+qy+6=0\] represents a pair of perpendicular straight lines, then [Kurukshetra CEE 2002]

If the equation \[12{{x}^{2}}+7xy-p{{y}^{2}}-18x+qy+6=0\] represents a

1.	If the equation \[12{{x}^{2}}+7xy-p{{y}^{2}}-18x+qy+6=0\] represents a pair of perpendicular straight lines, then [Kurukshetra CEE 2002]
A.	\[p=12,q=1\]
B.	\[p=1,q=12\]
C.	\[p=-1,q=12\]
D.	\[p=1,q=-12\]
Answer» B. \[p=1,q=12\]

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If the equation \[12{{x}^{2}}+7xy-p{{y}^{2}}-18x+qy+6=0\] represents a pair of perpendicular straight lines, then [Kurukshetra CEE 2002]

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