This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'No sub - clinical infection exists in - \nSelect and explain. \nA. Polio, B. Mumps, C. Chicken pox, D. Hepatitis A', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .disease in which subclinical infections occurs includes,measles,rubella,mumps,poliomyelitis,hepatitis A and B ,japanese encephalitis,inflenza and diphtheria. ref:park&;s textbook,ed 22,pg no 91', 'role': 'assistant'}]