This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'Causes of raised J.V.P. with hypotension are all except \nSelect and explain. \nA. Cardiac tamponade, B. Right ventricular M.I., C. Heart failure, D. 2nd Degree A. V. block', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]