Let $C$ be the curve $y^3 - 3xy + 2 = 0$. If $H$ and $V$ are the sets of points on the curve $C$ where the tangent to the curve is horizontal and vertical respectively,then

  • A
    $H = \{(1, 1)\}, V = \phi$
  • B
    $H = \phi, V = \{(1, 1)\}$
  • C
    $H = \{(0, 0)\}, V = \{(1, 1)\}$
  • D
    None of these

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