Assertion (A): The polarity of the membrane gets reversed when it becomes positively charged from the outer side.
Reason (R): Reversal of the polarity can make the membrane depolarised.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.