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If the pair of lines a x^(2)+2 h x y-a y...

If the pair of lines `a x^(2)+2 h x y-a y^(2)=0` and `b x^(2)+2 g x y-b y^(2)=0` be such that each bisects the angle between the other then

A

`a b+g h=0`

B

`h^(2)-a b=0`

C

`a h+b g=0`

D

`a g+b h=0`

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The correct Answer is:
A
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