This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': "Fisch's physiological bottleneck (narrowest pa) is present in which pa of VII N NOT RELATED - ENT \nSelect and explain. \nA. Labyrinthine segment, B. Geniculate ganglion, C. Horizontal segment, D. Mastoid segment", 'role': 'user'}, {'content': 'Answer: A \nExplanation: .', 'role': 'assistant'}]