In $\triangle ABC$,$m \angle B = \frac{\pi}{3}$ and $m \angle C = \frac{\pi}{4}$. Let point $D$ divide $BC$ internally in the ratio $1:3$. Then,the value of $\frac{\sin(\angle BAD)}{\sin(\angle CAD)}$ is

  • A
    $\frac{1}{3}$
  • B
    $\frac{1}{\sqrt{3}}$
  • C
    $\frac{1}{\sqrt{6}}$
  • D
    $\sqrt{\frac{2}{3}}$

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