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: Physiology
[{'content': 'Amount of glucose absorbed in proximal convoluted tubule: \nSelect and explain. \nA. 100%, B. 0%, C. 60%, D. 50%', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]