Concentration of the $$Ag^+$$ ions in a saturated solution of $$Ag_2C_2O_4$$ is $$2.2 \times 10^{-4} mol L^{-1}$$. Solubility product of $$Ag_2C_2O_4$$ is

A

$$4.5 \times 10^{-11}$$

B

$$5.3 \times 10^{-12}$$

C

$$2.42 \times 10^{-8}$$

D

$$2.66 \times 10^{-12}$$