This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': "Gaint 'a' waves in JVP occur in all except \nSelect and explain. \nA. Junctional rhythm, B. Pulmonary hypeension, C. Tricuspid regurgitation, D. Complete hea block", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ref Harrison 19 th ed pg 1485 Tricuspid stenosis is associated with large or gaint 'a'waves. Not tricuspid regurgitation ..", 'role': 'assistant'}]