This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Ophthalmology
Circumcorneal vascularization is seen in deficiency of 
Select and explain. 
A. Vit D, B. Vit A, C. Riboflavin, D. Thiamine
C: Riboflavin
Answer: C: Riboflavin 
Explanation: .