Practice question

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.