Which of the following events occur during the repolarization of a nerve fiber?

Which of the following ions are required for nerve conduction?

The propagation of an action potential during nerve impulse conduction is made possible by the movement of:

Which of the following statements is/are correct?
$(a)$ The electrical potential difference across the resting plasma membrane is called the resting potential.
$(b)$ $Na^+$ ions are responsible for the generation of an action potential.
$(c)$ $A$ nerve impulse is an action potential.

Given below is a diagram of a resting nerve fibre in a polarised state. Select the option which illustrates the correct distribution of $Na^{+}$ and $K^{+}$ ions along the membrane.

$A$ neuron becomes an electrically charged cell primarily due to the differential permeability and diffusion of which ion?