Which is wrong regarding conduction of nerve impulse?

Options

A. In a resting neuron, the axonal membrane is more permeable to `K^(+)` ions and nearly impermeable to `Na^(+)` ions
B. Fluid outside the axon has a high concentration of `Na^(+)` and low concentration of `K^(+)`, in a resting neuron
C. Ionic gradients are maintained by Na-K pumps across the resting membrane which transports 3 `Na^(+)` ions outwards for `2K^(+)` ions into the cell
D. A neuron is polarised only when the outer surface of axonal membrane possesses a negative charge and inner surface is positively charged

Answer

D