if $\large\frac{x}{y}=\frac{2}{5}$ then find the value of $\large\frac{(x^2+y^2)}{xy}$

Question

$\begin{array}{1 1} (a) 2.3 \\ (b) 2.5 \\ (c) 2.7 \\ (d) 2.9 \end{array} $