A variable line through the point `(p, q)` cuts the `x and y` axes at `A and B` respectively. The lines through `A and B` parallel to y-axis and x-axis respectively meet at `P`. If the locus of `P` is `3x+2y-xy=0`, then (A) `p=2, q=3` (B) `p=3, q=2` (C) `p=2, q=-3` (D) `p=-3, q=-2`