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
Definition of Blindness when visual acuity is less than ___________ in better eye according to NPCB and WHO respectively 
Select and explain. 
A. < 3/60 and < 6/18, B. < 6/18 and < 3/60, C. < 3/60 and < 3/60, D. < 6/18 and < 6/18
C: < 3/60 and < 3/60
Answer: C: < 3/60 and < 3/60 
Explanation: None