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: Physiology
Glossitis and cheilitis seen with which Vit. deficiency: 
Select and explain. 
A. Vit. B2, B. Vit. B12, C. Vit. K, D. Vit D
A: Vit. B2
Answer: A: Vit. B2 
Explanation: A i.e. B2