This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Conjunctiva, Subject name: Ophthalmology
Target diseases under VISION 2020 include 
Select and explain. 
A. Trachoma, B. Onchocerciasis, C. Refractive errors, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Target diseases identified for intervention under 'Vision 2020' initiative in India include:  1) Cataract, 2) Childhood blindness, 3) Refractive errors and low vision, 4) Corneal blindness, 5) Diabetic retinopathy, 6) Glaucoma, and 7) Trachoma (focal). Reference :- A K KHURANA 7th edition ; page-451