When dilute copper (ll) chloride solution is electrolysed, the reaction at the cathode is represented by the equation

A. Cu → Cu2+ + 2e-
B. Cu2+ + 2e- → Cu
C. 40H- – 4e- → O2 + 2H2O
D. 2CI- → CI2 + 2e

Correct Answer: Option B

B. Cu2+ + 2e- → Cu