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: Medicine
Oro-oculo-genital syndrome occurs due to 
Select and explain. 
A. Vit. A deficiency, B. Vit. B1 deficiency, C. Vit. B2 dificiency, D. Nicotininc acid dificiency
C: Vit. B2 dificiency
Answer: C: Vit. B2 dificiency 
Explanation: None