This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Most common cause of epidemic of infective hepatitis is - \nSelect and explain. \nA. HAV, B. HBV, C. HCV, D. HEV', 'role': 'user'}, {'content': 'Answer: D \nExplanation: <p> HEV causes large epidemics in Asia and Noh America. Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:220. <\\p>', 'role': 'assistant'}]