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
The deficiency of thiamine can be identified by measuring the red cell: 
Select and explain. 
A. Transketolase, B. Transaldolase, C. Alpha ketoglutarate dehydrogenase, D. Pyruvate dehydrogenase
A: Transketolase
Answer: A: Transketolase 
Explanation: None