$A$ mass $M \text{ kg}$ is suspended by a weightless string. The horizontal force required to hold the mass at $60^{\circ}$ with the vertical is

  • A
    $M g$
  • B
    $M g \sqrt{3}$
  • C
    $M g(\sqrt{3}+1)$
  • D
    $\frac{M g}{\sqrt{3}}$

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