This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
[{'content': "&;V' wave in JVP is due to \nSelect and explain. \nA. Atrial contraction, B. Mitral valve closure, C. Atrial relaxation, D. Tricuspid valve closure", 'role': 'user'}, {'content': 'Answer: D \nExplanation: The V wave mirrors the rise in atrial pressure before the tricuspid valve opens during diastole.Ref: Ganong&;s Review of medical physiology, 25th edition.Pg no. 542', 'role': 'assistant'}]