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
Alma ata Con frernce was held in - 
Select and explain. 
A. 1978, B. 1956, C. 1977, D. 1948
A: 1978
Answer: A: 1978 
Explanation: Ans. is 'a' i.e., 1978