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
Under National Program for Control of Blindness, District blindness control society is headed by 
Select and explain. 
A. District program manager, B. District collector, C. District eye surgeon, D. District health officer
B: District collector
Answer: B: District collector 
Explanation: None