If f:RR rarrRR and g:RR rarrRR are defin...

If `f:RR rarrRR and g:RR rarrRR` are defined by `f(x)=2x+3 and g(x)=x^(2)+7`, then the values of x such that `g(f(x))=8` are

A

1, 2

B

`-1, 2`

C

`-1, -2`

D

`1, -2`

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The correct Answer is:

C

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