Certain compounds are released by the $WBC$ which raise the body temperature. These compounds are known as

$A$: $ELISA$ 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.

$DPT$ vaccine doses are administered at specific intervals after birth. Identify the correct sequence for the $1^{st}$, $2^{nd}$, and $3^{rd}$ doses of $DPT$ from the following list:
$I$. $6 \; \text{weeks}$ after birth
$II$. $10 \; \text{weeks}$ after birth
$III$. $14 \; \text{weeks}$ after birth
$IV$. $24 \; \text{weeks}$ after birth
$V$. $29 \; \text{weeks}$ after birth

Which mosquito sits at an acute angle to the surface?

Assertion: Thick cuticle is mostly present in disease-resistant plants.
Reason: Disease-causing agents cannot grow on cuticle and cannot invade the cuticle.

Interferons are synthesized in response to the infection of which of the following?