For a general redox reaction:
Anode: $Red_1 \to Ox_1^{n_1+} + n_1 e^-$
Cathode: $Ox_2^{n_2+} + n_2 e^- \to Red_2$
Which of the following statements is incorrect?

• A
  The overall reaction can be written as $n_2 Red_1 + n_1 Ox_2^{n_2+} \rightleftharpoons n_2 Ox_1^{n_1+} + n_1 Red_2$
• B
  The electrons do not appear in the overall reaction because electrons produced at the anode are consumed at the cathode.
• C
  Here $n$ is the number of electrons transferred in the redox reaction.

  
• D
  If the reaction is carried out reversibly,the electrical work done is equal to the ratio of charge and potential difference through which the charge is moved.