This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Preganglionic parasympathetic fibres to parotid gland relay at 
Select and explain. 
A. Geniculate ganglion, B. Otic ganglion, C. Sub mandibular ganglion, D. Stellate ganglion
B: Otic ganglion
Answer: B: Otic ganglion 
Explanation: Sensory root by the auriculotemporal nerve. Sympathetic root is by the sympathetic plexus around middle meningeal aery. Secretomotor root is by the lesser petrosal nerve from the tympanic branch of cranial nerve IX. Motor root is by a branch from nerve to medial pterygoid. Ref BDC volume3,6th edition pg 311