Clathrins used in: (A) Receptor mediated endocytosis, (B) Exocytosis, (C) Cell to cell adhesion, (D) Plasma membrane
Answer is A. In receptor-mediated Endocytosis, clathrin is the receptors for the ligand. The cell membrane fuses around the receptor-ligand complex forming a vesicle. (Ref: Textbook of medical physiology-Geetha N)