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
[{'content': 'Thiamine level is best monitored by : \nSelect and explain. \nA. Transketolase level in blood, B. Thiamine level in blood, C. G6PD activity, D. Reticulocytosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Transketolase level in blood', 'role': 'assistant'}]