In an electrolysis experiment, a current i passes through two different cells in series, one containing a solution of \[CuS{{O}_{4}}\] and the other a solution of\[AgN{{O}_{3}}\]. The rate of increase of the weight of the cathodes in the two cells will be [NCERT 1972]

• A. In the ratio of the densities of Cu and Ag
• B. In the ratio of the at weights of Cu and Ag
• C. In the ratio of half the atomic weight of Cu to the atomic weight of Ag
• D. In the ratio of half the atomic weight of Cu to half the atomic weight of Ag