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
Postural hypotension following Percutaneous transluminal coronary angioplasty (PTC 
Select and explain. 
A. Autonomic dysfunction, B. Retroperitoneal bleeding, C. Entry site bleed, D. All of the above
A: Autonomic dysfunction
Answer: A: Autonomic dysfunction 
Explanation: (A) Autonomic dysfunction