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
Which Vitamin is involved in Redox reactions 
Select and explain. 
A. Pyridoxin, B. Biotin, C. Folic acid, D. Riboflavin
D: Riboflavin
Answer: D: Riboflavin 
Explanation: Ans. is 'd' i.e., Riboflavin