The curves ax^(2)+by^(2)=1 and Ax^(2)+B ...

The curves `ax^(2)+by^(2)=1 and Ax^(2)+B y^(2) =1` intersect orthogonally, then

A

`1/a+1/A=1/b+1/B`

B

`1/a-1/A=1/b-1/B`

C

`1/a+1/b=1/B-1/A`

D

None of these

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The correct Answer is:

B

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