This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Biochemistry
[{'content': 'Which enzyme level is tested in thiamine deficiency? \nSelect and explain. \nA. PDH, B. Pyruvate kinase, C. Transketolase, D. Kinase', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Thiamine (vitamin B1) Deficiency It is assessed by Erythrocyte transketolase activity. Thiamine (Vitamin B1) is the marker for transketolase enzyme -which is involved in HMP pathway (in RBCs) Activity of Transketolase is measured (not the quantity).', 'role': 'assistant'}]