Which immunoglobulin is the largest in size?

Which cells secrete interferons?

When an insect bites,the affected area swells. Which chemicals are likely introduced into the body?

Assertion : $A$ person who has received a cut and is bleeding needs to be given anti-tetanus treatment.
Reason : Anti-tetanus injection provides immunity by producing antibodies for tetanus.

Which of the following is not related to passive resistance?

Interferons are proteins that: