Nerve impulse travels faster in
a)	Medullated nerve fibre	b)	Non- medullated nerve fibre
c)	Both (a) and (b)	d)	None of the above

(a)

Nerve fibres are impermeable due to myclin sheath. But at some places this myelination is not found. During transmission of nerve impulse, the flow of ions is established between these non-myelinated portions

This kind of makes the transmission of impulse very fast, as the impulse do not have to travel all along the axon, it can jump over the axon