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: Social & Preventive Medicine
[{'content': 'Carries are impoant in all the following except ? \nSelect and explain. \nA. Polio, B. Typhoid, C. Measles, D. Diphtheria', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. is \'c\' i.e., Measles o Though incubatory carrier state occurs in measles, it is not so impoant. "The only source of infection is a case of measles. Carriers are not known to occur". - Park o In all other three disease, carrier state is impoant in transmission of infection.', 'role': 'assistant'}]