This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': 'Most common cause of postural hypotension is \nSelect and explain. \nA. Progressive cerebellar degeneration, B. Striatonigral degeneration, C. Peripheral neuropathy, D. Adrenal insufficiency', 'role': 'user'}, {'content': 'Answer: C \nExplanation: (C) Peripheral neuropathy # Causes of postural syncope: In patients receiving antihypertensive or vasodilator drugs and those who are hypovolemic because of diuretics, excessive sweating, diarrhea, vomiting, hemorrhage, or adrenal insufficiency.', 'role': 'assistant'}]