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
[{'content': 'Corneal Vasucularisation is a characteristic manifestation of which vitamin deficiency \nSelect and explain. \nA. Thiamine, B. Pantothenic acid, C. Riboflavin, D. Niacin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Chielosis and corneal vascularisation are characteristic manifestation of vitamin B2 (Riboflavin) deficiency.', 'role': 'assistant'}]