Given below is a galvanic cell $$\text{Cu}(s) \mid \text{Cu}^{2+}(aq)\ (x\ \text{M}) \parallel \text{Ag}^+(aq)\ (y\ \text{M}) \mid \text{Ag}(s)$$. The possible condition for the galvanic cell to develop an emf of 0.5 V is, given that $$E^\circ_{\text{Cu}^{2+}/\text{Cu}} = 0.34$$ V and $$E^\circ_{\text{Ag}^+/\text{Ag}} = 0.8$$ V

A

$$x = 0.015$$ and $$y = 0.3$$

B

$$x = 0.05$$ and $$y = 0.25$$

C

$$x = 0.04$$ and $$y = 0.2$$

D

$$x = 0.011$$ and $$y = 0.5$$