Active immunity may be acquired by

In the figure, structure of an antibody molecule is shown. Name the parts $A,\,B$ and $C$. Show $A,\,B$ and $C$ in the diagram.

Immunoglobulins are made up of

$B$-cells are lymphocytes which produce the humoral immunity. These cells are produced by

Which of the following is not an autoimmune disease?

Differentiate the following and give examples of each:

$(a)$ Innate and acquired immunity

$(b)$ Active and passive immunity