This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidneys and Body Fluids, Subject name: Physiology
[{'content': 'Maximum absorption of HCO3 occurs in: \nSelect and explain. \nA. PCT, B. DCT, C. CT, D. ALH', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans A. PCTAbout 70% of filtered HCO3 occur at PCT. 70% of filtered water. NaCl absorption occur at PCT. 100% of filtered glucose and amino acid occur at PCT', 'role': 'assistant'}]