A compound is formed by two elements X and Y. The atoms of element X form hcp lattice and those of element Y occupy $\large\frac{1}{4}^{th}$ of the tetrahedral voids. What is the formula of the compound formed?

Question

$\begin{array}{1 1}(A)\;X_2Y&(B)\;X_3Y\\(C)\;XY&(D)\;\text{None of these}\end{array}$