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': 'Which of the following is a voluntary organization? \nSelect and explain. \nA. TB Association of India, B. Directrate of Health Service, C. Indian Medical Council, D. Council of Medical Research', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is `a' i.e., TB Association of India", 'role': 'assistant'}]