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JEEMAIN and NEET
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Mathematics
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Class11
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Coordinate Geometry
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If the pair of straight lines $x^2-2pxy-y^2=0$ and $x^2-2qxy-y^2=0$ be such that each pair bisects the angle between the other pair then,
$\begin{array}{1 1}(A)\;pq=-1 \\(B)\;p=q \\(C)\;p=-q\\(D)\;pq=1 \end{array}$
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