simplify (\sqrt{x})^{\large\frac{-2}{3} \sqrt{y^4}/\sqrt{xy^{\large\frac{-1}{2}}

Question

( A ) \large\frac{x}{y]
( B ) \large\frac{y^{\large\frac{9}{8}}{x^{\large\frac{5}{6}}
( C ) 1
( D ) \large\frac{y^{\large\frac{7}{8}}{x^{\large\frac{7}{6}}