This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Carbohydrates, Subject name: Biochemistry
[{'content': 'Severe thiamine deficiency is associated with: \nSelect and explain. \nA. Decreased RBC transketolase activity, B. Increased clotting time, C. Decreased RBC transaminase activity, D. Increased xanthic acid excretion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A Decreased RBC transketolase activity(Ref: Harper 31/e page 185)Thiamine is a coenzyme of Erythrocyte transketolase so its activity is decreased if Thiamine deficiency', 'role': 'assistant'}]