If $f:R \to R$ and $g:R \to R$ 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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