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
Visual activity cut off for the referral to PHC is, 
Select and explain. 
A. <6/18, B. <6/6, C. <6/9, D. None of the above
C: <6/9
Answer: C: <6/9 
Explanation: None