An 'antigen' is

  • A

    That which acts with plasma

  • B

    That which opposes the action of antibody

  • C

    The stimulus for antibody production

  • D

    The antibody only

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’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.

  • [AIIMS 2017]

............. 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