There is a separator between positive and negative plate
answer is B.
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Detailed Solution
A rechargeable nickel-cadmium cell is a jelly roll arrangement and separated by layer soaked in moist sodium or potassium hydroxide. Overall reaction during discharge is Cd(s)+2Ni(OH)3(s)⟶CdO(s)+2Ni(OH)2(s)+H2O(l)