This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of carbohydrate, Subject name: Biochemistry
Pyruvate dehydrogenase complex contains all except 
Select and explain. 
A. Biotin, B. NAD, C. FAD, D. CoA
A: Biotin
Answer: A: Biotin 
Explanation: Pyruvate dehydrogenase complex--thiamin diphosphate, lipoate, NAD+, FAD, and CoA Reference: Harper; 30th edition; Page no: 163