If $$16^{x}=\frac{64}{256^{y}}$$ and $$9^{x}=\frac{9}{3^{y}}$$, then the values of x and y are respectively,

A

$$\frac{5}{6}$$ and $$\frac{1}{2}$$

B

$$\frac{7}{6}$$ and $$\frac{1}{3}$$

C

$$\frac{5}{6}$$ and $$\frac{1}{3}$$

D

$$\frac{11}{6}$$ and $$\frac{1}{3}$$