Match List-I with List-II regarding the parts of the excretory system and their functions or characteristics. List-I List-II A. Descending limb of Henle's loop I. Impermeable to water but allows transport of electrolytes B. Ascending limb of Henle's loop II. U-shaped minute vessel running parallel to Henle's loop C. Proximal Convoluted Tubule III. Permeable to water but almost impermeable to electrolytes D. Vasa rect

Step-by-step solution

According to the NCERT Biology textbook: The descending limb of Henle's loop (A) is permeable to water but almost impermeable to electrolytes (III). The ascending limb of Henle's loop (B) is impermeable to water but allows the transport of electrolytes actively or passively (I). The Proximal Convoluted Tubule or PCT (C) is the major site of reabsorption, where nearly all essential nutrients and 70-80 percent of electrolytes and water are reabsorbed (IV). The vasa recta (D) is a minute U-shaped vessel of the peritub