‘Enterobiasis' disease is caused by

Filarial larva can be collected from man's

Which one of the following is found in the mouth of human beings

A new born baby who receives $IgA$ form its mother's milk develops

Which is an example of active immunity ?

Identify the molecules $(A)$ and $(B)$ shown below and select the right option giving their source and use.

Molecule             $\to $         Source                  $\to $                Uses