The spread of $AIDS$  disease is promoted by

  • A

    Homosexuality

  • B

    Immoral way of life

  • C

    Use of infected needles in blood transfusion

  • D

    All the above

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One of the inflammatory reaction induced by histamine is

A boy happens to put his foot on a rusted nail and the doctor gives him an injection. Most likely he has given

$A$ : Live attenuated vaccine is better in terms of immunity provided to the recipient.
$R$ : As secondary lymphoid organs, example peyer's patches are stimulated to protect the individual.

Assertion : The antibodies separted from serum are homogenous.

Reason : Monoclonal antibodies are homogenous immunological reagents.

  • [AIIMS 2013]