The chemical present in Temik is

$A$ child would develop mental illness if one does not get:

Pheromones are chemicals that are used in animals for:

The first dose of $BCG$ vaccine is given at the time of:

$A$: $ELISA$ is based on the principle of antigen-antibody interaction.
$B$: In $ELISA$,infection by a pathogen can be detected by the presence of antigens or by detecting the antibodies synthesized against the pathogen.

Which of the following cells do not act as phagocytes?