$\bigg( \large\frac{x^{-4} }{y^{-10}}\bigg)^{\large\frac{5}{4}}$=_____

Question

$\begin{array}{1 1} x^5.y^{25/2} \\ x^{-5}.y^{25/2} \\ x^5.y^{-25/2} \\ x^{-5}.y^{-25/2} \end{array} $