Question

@riya - Gunah nhi vo mujhe na thode se paise chahiye xD
5rs. (^_^)
@krish - ye de dega xD​

Answer 1

In immunology, an antigen is a molecule or molecular structure, such as may be present on the outside of a pathogen, that can be bound by an antigen-specific antibody or B-cell antigen receptor. The presence of antigens in the body normally triggers an immune response.

Ye Khud lele mese , meko toh ye ghanta dega xD