Answer:
The correct answer is b. Immunogens
Explanation:
Immunogens are the antigens that can trigger the immune response in the body once gets inside the body. Any antigen having capacity to excite a immune response against them is called immunogens but not every antigen is immunogen.
An antigen is called immunogen when it has some characteristic features like foreignness, high molecular weight and chemical complexity. An immunogen can initiate both innate and adaptive immune response. Adaptive immune response is memory based and very specific for any particular immunogen.
Some common immunogens are: bacteria, virus, drugs, chemicals, dust, toxins.
