Which of the following can be used to reduce local action in a Laclanche cell?

Which of the following can be used to reduce local action in a Laclanche cell?
  • A.
    A carbon rod as the positive pole
  • B.
    Pure zinc as the negative pole
  • C.
    Potassium permanganate solution in contact with the positive pole
  • D.
    common salt solution
Correct Answer: Option C
Explanation
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