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': 'Giant V wave on examination of the jugular venous pulse is suggestive of : \nSelect and explain. \nA. Atrial flutter with changing block, B. Tricuspid incompetence, C. Ventricular septal defect, D. Pulmonary stenosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Giant v waves indicate the presence of tricuspid regurgitation. The jugular venous pressure should be quantified in centimeters of water (normal <=8 cm) by estimating the height of the venous column of blood above the sternal angle in centimeters and then adding 5 cm. In the early stages of HF, the venous pressure may be normal at rest but may become abnormally elevated with sustained (~1 min) pressure on the abdomen (positive abdominojugular reflux). ref : ( Harrison&;s principle of internal medicine,20th edition,pg no.1905 )', 'role': 'assistant'}]