A) \[px+qy=0\]
B) \[px-qy=0\]
C) \[{{p}^{2}}x+{{q}^{2}}y=0\]
D) \[{{q}^{2}}x-{{p}^{2}}y=0\]
Correct Answer: A
Solution :
Equation of lines are\[(px+qy)(py-qx)=0\]. Hence, one line is\[px+qy=0\].
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