This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
The Otic Ganglion: 
Select and explain. 
A. Is in relation to maxillary nerve, B. Receives preganglionic parasympathetic fibers, through the greater superficial petrosal nerve, C. Sends postganglionic parasympathetic fibers to auriculotemporal nerve, D. Is related to the tensor tympani
C: Sends postganglionic parasympathetic fibers to auriculotemporal nerve
Answer: C: Sends postganglionic parasympathetic fibers to auriculotemporal nerve 
Explanation: It is a peripheral parasympathetic ganglion which relays secretomotor fibres to the parotid gland.
Topographically, it is intimately related to the mandibular nerve, but functionally it is a part of the glossopharyngeal nerve.
The sympathetic root is derived from the plexus on the middle meningeal artery. It contains postganglionic fibres arising in the superior cervical ganglion. The fibres pass through the otic ganglion  without relay and reach the parotid gland via the auriculotemporal nerve.
They are vasomotor in function. The sensory root comes from the auriculotemporal nerve and is sensory to the parotid gland.