In a Battery,the Following Two Oxidation-Reduction Reactions Are Taking Place

Multiple Choice

In a battery,the following two oxidation-reduction reactions are taking place: rxn A: Zn → Zn⁺² + 2e^-
Rxn B: 2 NH₄⁺ + 2e^- → 2 NH₃ + H₂
Which reaction is taking place at the cathode?

A) rxn A
B) rxn B
C) Both reactions are happening at both the anode and cathode.
D) Both reactions are happening are happening at the electrode.
E) The reaction takes place at the electrode,not the cathode.