Saltatory conduction occurs in
a)	Myelinated nerves fibres	b)	Non-myelinated nerve fibres
c)	Liver cells	d)	All of the above

(a)

The myelin sheath of myelinated nerve fibres prevents flow of ions between extracellular fluid and axoplasm. Exchange of ions can occur only at the nodes of Ranvier. Therefore, action potential jumps from node to node and passes along myelinated axon faster than the series of smaller local currents in a non-myelinated axon. This is called saltatory conduction.