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
Maximum absorption of HCO3 occurs in: 
Select and explain. 
A. PCT, B. DCT, C. CT, D. ALH
A: PCT
Answer: A: PCT 
Explanation: 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