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': 'Water hammer pulse is seen in- \nSelect and explain. \nA. Aoic stenosis, B. Aoic regurgitation, C. Aoic stenosis and Aoic regurgitation, D. Mitral regurgitation', 'role': 'user'}, {'content': "Answer: B \nExplanation: Answer is B (Aoic Regurgitation ): The Water hammer pulse or Corrigan's pulse is characterized by an abrupt and rapid carotid upstroke with a rapid fall off (collapsing pulse). It is characteristic of Aoic Regurgitation.", 'role': 'assistant'}]