Which part of nephron primarily reabsorbs water and solutes?
Correct option is C, Proximal tubule. In Excretory System, the accurate description is Proximal tubule, and that is what you should commit to memory. Keep the definition tight and the role clear — the functional job described in the stem is exactly what Proximal tubule does in Excretory System. Then Proximal 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 tubule. Remember that physiology questions reward precise language: name the process, the location, and the outcome, then match that to the option text.
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.