A very thin copper plate is electro-plated with gold using gold chloride in HCl. The current was passed for 20 minutes and the increase in the weight of the plate was found to be 2 gram [Au = 197]. The current passed was:
(A) 0.816 amp
(B) 1.632 amp
(C) 2.448 amp
(D) 3.264 amp