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If the line ax +by+c = 0 where a, b, c ...

If the line `ax +by+c = 0` where `a, b, c inR` and` a, b,c notin 0` is a normal to the curve `y=x^(2)`, then `x^(3)+2a^(2)x+4a^(2)c = 0`has

A

three distinct real roots one of which is b

B

exactly one real root which is b

C

one root b and two other repeated roots

D

none of the roots is equal to b

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A, B, C, D
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