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
Mobile eye care services are not done at which level 
Select and explain. 
A. Primary care level, B. Tertiary care, C. Secondary care, D. District hospitals
B: Tertiary care
Answer: B: Tertiary care 
Explanation: None