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The pair of lines joining origin to the points of intersection of, the two curves `ax^2+2hxy + by^2+2gx = 0` and `a^'x^2 +2h^'xy + b^'y^2 + 2g^'x = 0` will be at right angles, if

A

`g'(a+b)= g(a'+b')`

B

`g'(a'+b')= g(a+b)`

C

`g'(a-b) = g(a'-b')`

D

None of these

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The correct Answer is:
A
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MTG-WBJEE-STRAIGHT LINES-WB JEE Previous Years Questions
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