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
Most common cause of postural hypotension is 
Select and explain. 
A. Progressive cerebellar degeneration, B. Striatonigral degeneration, C. Peripheral neuropathy, D. Adrenal insufficiency
C: Peripheral neuropathy
Answer: C: Peripheral neuropathy 
Explanation: (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.