This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition, Subject name: Medicine
Angular oral fissures is treated with- 
Select and explain. 
A. Riboflavin, B. Pyridoxine, C. Cynocobalamine, D. Vitamin C
A: Riboflavin
Answer: A: Riboflavin 
Explanation: riboflavin deficiency causes glossitis , angular stomatitis, cheilosis Ref Harrison 20th edition pg 97e