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': 'Iceberg phenomena is not seen in - \nSelect and explain. \nA. Measles, B. AIDS, C. Polio, D. Rubella', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Measles Iceberg phenomena is not seen in rabies, tetanus and measles.", 'role': 'assistant'}]