Antigen combining site of the antibody -: (A) Idiotype, (B) Paratope, (C) Epitope, (D) Hapten
Answer is B. 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