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: Surgery
[{'content': 'Allen test detects insufficiency of which artery \nSelect and explain. \nA. Aorta, B. Umbilical artery, C. Popliteal artery, D. Radial artery', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Allen test can detect the patency of arteries forming the palmar arch . i.e. Radial & Ulnar arteries . In the given options so radial artery is correct .', 'role': 'assistant'}]