Major site of tubular reabsorption of filtered water and solutes is:
Correct option is B, Proximal convoluted tubule. In Excretory System, the accurate description is Proximal convoluted tubule, and that is what you should commit to memory. Keep the definition tight and the role clear — Proximal convoluted tubule is the option that correctly names the structure, process, or principle asked for in Excretory System. Then Proximal convoluted tubule is the answer you can defend. Check yourself by covering the options and writing the answer first, then matching the letter — that builds confidence. If the wording feels dense, translate it into everyday language first, then map that plain sentence back onto Proximal convoluted tubule.
Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.