This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
Clathrins used in 
Select and explain. 
A. Receptor mediated endocytosis, B. Exocytosis, C. Cell to cell adhesion, D. Plasma membrane
A: Receptor mediated endocytosis
Answer: A: Receptor mediated endocytosis 
Explanation: 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)