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: Medicine
[{'content': 'Exercise testing is absolutely ,contraindicated in which one of the following - \nSelect and explain. \nA. One weekof following myocardial infarction, B. Unstable angina, C. Aortic stenosis, D. Peripheral vascular disease', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]