$ABC$ is a triangle. If $\sin \left(\frac{A+B}{2}\right) = \frac{\sqrt{3}}{2}$,then the value of $\sin \frac{C}{2}$ is

  • A
    $\frac{1}{\sqrt{2}}$
  • B
    $0$
  • C
    $\frac{1}{2}$
  • D
    $\frac{\sqrt{3}}{2}$

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