Study the following and pick up the incorrect statements:
I.The axolemma has more \( K^+ \) leakage channels than \( Na^+ \) leakage channels.
II.Ligand gated channels open or close in response to electrical stimuli.
III.Voltage gated channels open in response to a change in membrane potential.
IV.Speed of conduction of nerve impulse is more in non myelinated nerve fibre than the myelinated nerve fibre.