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: Surgery
[{'content': 'Causes of raised J.V.P. with hypotension are allexcept \nSelect and explain. \nA. >Cardiac tamponade, B. >Right ventricular M.I., C. >Hea failure, D. >2nd degree A.V. block', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 2nd degree A.V. block Differential diagnosis of increased venous pressure with hypotension Cardiac tamponade Constrictive pericarditis Right ventricular wall M.I. Restrictive cardiornyopathy Right hea failure', 'role': 'assistant'}]