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
Maximum absorption of water takes place in 
Select and explain. 
A. Proximal convoluted tubule, B. Distal convoluted tubule, C. Collecting duct, D. Loop of Henle
A: Proximal convoluted tubule
Answer: A: Proximal convoluted tubule 
Explanation: Ascending limb of the loop of Henle and an early segment of distal tubule is impermeable to water. Maximum of filtered water (60-70%) is reabsorbed in the proximal tubule, with or without Vasopressin. This is independent of the fluid and electrolyte status of the body.