Given below is a graph showing change of...

Given below is a graph showing change of potential difference occuring during conduction of nerve impulse through an axon, which one is correct about the shadded area-A in this graph :

Shows depolarisation, due to opening of `Na^(oplus)` VGC

Shows repolarisation, due to opening of `K^(oplus)` VGC

Shows hyperpolarisation, due to on time closing of `Na^(oplus)` VGC and `K^(oplus)` VGC

Shows hyperpolarisation, due to late closing of `K^(oplus)` VGC

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