The lines a^2x^2+bcy^2=a(b+c)xy will be ...

The lines `a^2x^2+bcy^2=a(b+c)xy` will be coincident , if

A

(a) `a=0` or `b=c`

B

(b) `a=b` or `a=c`

C

(c) `c=0` or `a=b`

D

(d) `a=b+c`

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The correct Answer is:

A

NA

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