Which one of the following could not be liberated from a suitable electrolyte by the passage of `0.25` faraday of electricity through that electrolyte

Options

A. 0.25 mole of Ag
B. 16gm of Cu
C. 2gm of `O_(2) (g)`
D. 2.8ltrs of `H_(2)` at STP

Answer

B

Explanation

0.25F will deposit 0.25 equivalents.