Streptomycin was first isolated in $1944-45$ by

Which of the following diseases is not caused by smoking?

The treatment of these diseases has become possible due to antibiotics.

Scopolamine was used during World War $II$. What is its source?

$A$ person showing unpredictable moods, outbursts of emotion, quarrelsome behaviour and conflicts with others is suffering from

$A$: $ELISA$ 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.