This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Renal Tubular Reabsorption and Secretion, Subject name: Physiology
Maximum reabsorption of water occurs in which part ofkidney- 
Select and explain. 
A. Proximal convoluted tubule, B. Distal convoluted tubule, C. Cortical collecting duct, D. Medullary collecting duct
A: Proximal convoluted tubule
Answer: A: Proximal convoluted tubule 
Explanation: Ans. is 'a' i.e., Proximal convoluted tubule o Most of the solutes and water are maximally absorbed in proximal tubule :-i) 60-70% of Na+ is reabsorbed along with 60-70% of Cl-ii) 60-70% of K+ is reabsorbediii) 60-70% of water is reabsorbediv) All the (100%) glucose and amino-acids are absorbedv) About 80-90% of bicarbonate is reabsorbedvi) 40-50% of urea is reabsorbed