In NICAD cell the reaction occur at cath...

In NICAD cell the reaction occur at cathode during the discharging is -

A

`Ni_^(2+) + 2e^- rarrNi`

B

`NiO_2 + 2H_2O + 2e^- rarr Ni(OH)_2 + 2OH^-`

C

`Cd^(2+) + 2e^- rarr Cd`

D

`Cd (OH)_2 + 2e^- rarr Cd + 2OH^-`

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