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: Medicine
[{'content': "Shirmer's test is used to assess \nSelect and explain. \nA. Greater superficial petrosal nerve, B. Stapedial branch, C. Chorda tympani nerve, D. Stylohyoid branch", 'role': 'user'}, {'content': "Answer: A \nExplanation: Answer is A (Greater superficial petrosal nerve): Shirmer's test is done to assess the integrity of Greater Superficial Petrosal Nerve (Branch of Facial Nerve) by assessing the Lacrimation function. Topographical Test for Facial Nerve Function Branch / Nerve assessed Shirmer's test Greater Superficial Petrosal Nerve (GSPN) Stapedial Reflex Accoustic Reflex Stapedial branch (Branch to stapedius) Electrogustometry (Taste testing) Chorda Tympani Branch Salivary Flow Rate Chorda Tympani Branch", 'role': 'assistant'}]