This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Non communicable diseases, Subject name: Social & Preventive Medicine
All of the following is true regarding blindness except - 
Select and explain. 
A. There is estimated 45 million people blind world-wide, B. 20% of cases blindness in India is due to cataract, C. Most common cause of blindness in India is cataract, D. Visual acuity less than 3/60 is blindness
B: 20% of cases blindness in India is due to cataract
Answer: B: 20% of cases blindness in India is due to cataract 
Explanation: *62.6% cases blindness in India is due to cataract *19.7% due to refractive error. Ref- Park&;s textbook of Preventive and social medicine 23rd edition.