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
Which of the following is a voluntary organization? 
Select and explain. 
A. TB Association of India, B. Directrate of Health Service, C. Indian Medical Council, D. Council of Medical Research
A: TB Association of India
Answer: A: TB Association of India 
Explanation: Ans. is `a' i.e., TB Association of India