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
[{'content': 'Secretomotor fibers to submandibular ganglion are carried by which nerve? \nSelect and explain. \nA. Facial nerve, B. Mandibular nerve, C. Glossopharyngeal nerve, D. Lingual nerve', 'role': 'user'}, {'content': "Answer: A \nExplanation: Submandibular ganglion is a parasympathetic peripheral ganglion. It is a relay station for secretomotor fibres to the submandibular and sublingual salivary glands. Topographically, it is related to the lingual nerve, but functionally, it is connected to the chordatympani branch of the facial nerve (chorda tympani). The motor or parasympathetic fibres pass from the lingual nerve to the ganglion through the posterior root. These are preganglionic fibres that arise in the superior salivatory nucleus and pass through the facial nerve, the chorda tympani, and the lingual nerve to reach the ganglion. Ref: BD Chaurasia's HUMAN ANATOMY, Volume 3, 4th edition.", 'role': 'assistant'}]