Simplify: 3x2y6xy2\frac{3x^2y}{6xy^2}6xy23x2y for x,y≠0x, y \neq 0x,y=0.
x2y\frac{x}{2y}2yx
2xy\frac{2x}{y}y2x
xy2\frac{xy}{2}2xy
2xy2xy2xy