This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
[{'content': 'Antigen combining site of the antibody - \nSelect and explain. \nA. Idiotype, B. Paratope, C. Epitope, D. Hapten', 'role': 'user'}, {'content': 'Answer: B \nExplanation: A paratope, also called an antigen-binding site, is a pa of an antibody which recognizes and binds to an antigen. Ref: Ananthanarayan & Panikers textbook of microbiology 9th edition pg:88', 'role': 'assistant'}]