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: Biochemistry
Corneal Vasucularisation is a characteristic manifestation of which vitamin deficiency 
Select and explain. 
A. Thiamine, B. Pantothenic acid, C. Riboflavin, D. Niacin
C: Riboflavin
Answer: C: Riboflavin 
Explanation: Chielosis and corneal vascularisation are characteristic manifestation of vitamin B2 (Riboflavin) deficiency.