If two lines ax^(2)+2hxy+by^(2)=0 are e...

If two lines `ax^(2)+2hxy+by^(2)=0` are equally inclined with
co-ordinate axes, then

A

(a) `h=0` and `ablt0`

B

(b) `a=b`

C

(c) `a=+-b`

D

(d) `ab gt 0, h=0`

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The correct Answer is:

B

NA

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