The nerve fibre in its resting stage is

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.

Assertion: The imbalance in concentration of $Na^+$,$K^+$ and proteins generates resting potential.
Reason: To maintain the unequal distribution of $Na^+$ and $K^+$,the neurons use electrical energy.

$A$ nerve impulse is generated in a nerve fiber when the membrane becomes more permeable to:

What is resting potential?

What is the speed of nerve impulse conduction in mammalian nerve fibers?