If $f(x) = \min \{1, x^2, x^3\}$,then

  • A
    $f(x)$ is discontinuous $\forall \, x \in R$
  • B
    $f(x) > 0$ $\forall \, x \in R$
  • C
    $f(x)$ is not differentiable but continuous $\forall \, x \in R$
  • D
    $f(x)$ is not differentiable for two values of $x$

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