$\sin ^{-1} x+\sin ^{-1} 2 x=\frac{\pi}{3}$ হলে $x=?$

$\frac{2 \sqrt{3}}{\sqrt{7}}$

$\frac{\sqrt{3}}{2 \sqrt{7}}$

$\frac{-2 \sqrt{3}}{\sqrt{7}}$

$-\frac{\sqrt{3}}{2 \sqrt{7}}$