In the circuit shown, find C if the effective capacitance of the whole circuit is to be 0.5 $$\mu F$$. All values in the circuit are in $$\mu F$$.

A

$$\frac{7}{10}$$ $$\mu F$$

B

$$4\mu F$$

C

$$\frac{7}{11}$$ $$\mu F$$

D

$$\frac{6}{5}$$ $$\mu F$$