Which of the following is not an autoimmune disease?

 What is the role of spleen in Human body?

What are the two corollaries related to immune system ?

Assertion : Interferons are a type of'antibodies produced by body cells infected by bacteria.

Reason : Interferons stimulate inflammation at the site of injury.

Draw a well-labelled diagram of an antibody molecule.

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