This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
[{'content': 'The &;a&;wave of jugular venous pulse is produced by- \nSelect and explain. \nA. Atrial relaxation, B. Atrial systole, C. Atrial diastole, D. Rapid venous filling', 'role': 'user'}, {'content': 'Answer: B \nExplanation: JVP or jugular venous is a reflection of the right atrial pressure.The "a" wave in JVP reflects atrial systole Ref Harrison 20th edition pg 1436', 'role': 'assistant'}]