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': 'All of the following clinical finding are consistent with severe mitral stenosis EXCEPT- \nSelect and explain. \nA. Atrial fibrillation, B. Pulsatile liver, C. Opening snap late after S2, D. Pulmonary vascular congestion', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In severe Mitral Regurgitation, Clinical features are : Atrial fibrillation, Pulsatile liver, Pulmonary vascular congestion. * In atrial fibrillation, First hea sound is loud and can be palpable(tapping apex). *An opening snap may be audible and moves closer to the second sound as the stenosis becomes more severe and left atrial pressure rises. Reference : Davidson, 23rd Edition, page no : 518.', 'role': 'assistant'}]