The distance between the foci of a hyperbola is $16$ and its eccentricity is $\sqrt 2$. Its equation is

Question

$\begin{array}{1 1}(A)\;x^2-y^2=32 \\(B)\;\frac{x^2}{4} -\frac{y^2}{9}=1 \\(C)\;2x^2-3y^2=7 \\(D)\; none\;of\;these \end{array}$