This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Facial Nerve And Its Disorders, Subject name: ENT
[{'content': 'Lacrimation is affected when facial nerve injury is at: \nSelect and explain. \nA. Geniculate ganglion, B. Mastoid segment, C. At Otic ganglion, D. At Stylomastoid foramen', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (a) Geniculate ganglion(Ref. Cummings, 6th ed., 2606)Mastoid segment and Stylomastoid foramen are beyond the geniculate ganglion.Otic ganglion is for the parasympathetic supply to the parotid.', 'role': 'assistant'}]