This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Community Ophthalmology, Subject name: Ophthalmology
Which of the following is not an agency for vision 2020 program 
Select and explain. 
A. WHO, B. UNESCO, C. ORBIS, D. Sight Savers International
B: UNESCO
Answer: B: UNESCO 
Explanation: UNESCO is not a paicipant for vision 2020 program Vision 2020-Right to Sight Initiative