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': 'Pulsus parvus et tardus is seen in ? \nSelect and explain. \nA. Severe AS, B. Severe MS, C. Severe AR, D. Severe MR', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. Severe ASPulsus tardus or pulsus parvus-et-tardus is a slow rising pulse with delayed systolic peak. It is seen in severe AS.', 'role': 'assistant'}]