Which of the following statements is wrong regarding conduction of nerve impulse ?

Options

A. In a resting neuron, the axonal membrane is more premeable to `K^+` ions and nearly impermeable to `Na^+` ions.
B. Fluid outside the axon has a high concentration of `Na^+` ions and low concentration of `K^+`, in a resting neuron.
C. Ionic gradient's are maintained by `Na^+ K^+` pumps across the resting membrane, which transport `3Na^+` ions outwards for `2K^+` into the cell.
D. A neuron is polarized only when the outer surface of the axonal membrane posses a negative a charge and its inner surface is positively charged.