The preganglionic parasympathetic fibres to the parotid gland travel in -
Preganglionic fibers → Inferior salivary nucleus, IX nerve, tympanic branch, tympanic plexus, lesser petrosal nerve.
Ganglion → Otic ganglion.
Postganglionic fibers → Auriculotemporal nerve.
Lesser petrosal nerve
Greater petrosal nerve
Deep petrosal nerve
Internal carotid nerve