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': 'What is intermittent claudication experienced as? \nSelect and explain. \nA. Pain in the muscle at rest only, B. Pain in the muscle on first step, C. Pain in the muscle with exercise, D. Pain in the muscle at the end of exetion', 'role': 'user'}, {'content': "Answer: C \nExplanation: Intermittent claudication is pain affecting the calf, and, less commonly the thigh and buttock, which is induced by exercise and relieved by rest. It occurs as a result of muscle ischemia during exercise caused by obstruction to aerial flow. Ref: Schwaz's Principles of Surgery, 9th Edition, Chapter 23 ; Physical Therapist's Clinical Companion By Springhouse Corporation, Page 73", 'role': 'assistant'}]