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
. Proper functioning of Kreb cycle does not occur with deficiency of: 
Select and explain. 
A. Thiamane, B. Riboflavin, C. Vitamin E, D. Vit K
A: Thiamane
Answer: A: Thiamane 
Explanation: A i.e. Thiamine; B i.e. Riboflavin