An 'antigen' is
That which acts with plasma
That which opposes the action of antibody
The stimulus for antibody production
The antibody only
’Pathogens' are also known as
Assertion: Artificially acquired passive immunity results when antibodies or lymphocytes produced outside the host are introduced into a host.
Reason: A bone marrow transplant given to a patient with genetic immunodeficiency is an example of artificially acquired passive immunity.
............. Technology is useful in Vaccines production
Lymphocytes are seen in large numbers at sites of inflammation because
$T$-cells are lymphocytes which produce the cellular immunity. These are developed from