# The vertices of the hyperbola $9x^2-16y^2-36x+96y-252=0$ are
$\begin{array}{1 1}(A)\;(6,3)\;and\; (-6,3) \\(B)\;(6,3)\;and\;(-2,3) \\(C)\;(-6,3)\;and\;(-6,-3) \\(D)\;\text{none of these} \end{array}$