This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Health education & planning, Subject name: Social & Preventive Medicine
Which of the following(s) is are state responsibility for healthsector 
Select and explain. 
A. water supply and sanitation, B. Promotion of research through reseach centres & other bodies, C. Prevention of adulteration, D. Prevention of communicable disease
A: water supply and sanitation
Answer: A: water supply and sanitation 
Explanation: For purpose of planning health sector has been divided into the following subsectors Water supply and sanitation Control of communicable diseases Medical education training and research Public health services Family planning Indigenous system of medicine(refer pgno:876 park 23 rd edition)