Snake venom antibody, which is prepared against snake venom, is an example of which type of immunization?

Which of the following is a pentameric immunoglobulin and is produced first in a primary response to an antigen?

Which of the following provides passive immunity?
$i$. Colostrum
$ii$. Antibodies against rabies pathogens
$iii$. After recovery from measles
$iv$. Polio vaccine

The treatment of snake-bite by antivenom is an example of

In higher vertebrates, the immune system can distinguish between self and non-self cells. Due to genetic or other unknown reasons, the immune system sometimes loses this property and starts attacking self-cells, resulting in:

Edward Jenner discovered