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If the pairs of lines x^(2) – 2nxy - y^(...

If the pairs of lines `x^(2) – 2nxy - y^(2) = 0` and `x^(2) – 2mxy - y^(2) = 0` are such that one of them represents the bisectors of the angles between the other, then

A

`(1)/(n)+(1)/(m)=0`

B

`(1)/(n)-(1)/(m)=0`

C

nm - 1 = 0

D

mn + 1 = 0

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The correct Answer is:
D
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