Two voltameters, one of copper and another of silver, are joined in parallel. When a total charge q flows through the voltameters, equal amount of metals are deposited. If the electrochemical equivalents of copper and silver are `Z_1` and `Z_2` respectively the charge which flows through the silver voltameter is
A. `q(z_(1))/(z_(2))`
B. `q(z_(2))/(z_(1))`
C. `(q)/(1+(z_(1))/(z_(2)))`
D. `(q)/(1+(z_(2))/(z_(1)))`
