Select the correct statement with respect to diseases and immunisation.
A. Certain protozoans have been used to mass produce hepatitis B vaccine
B. Injection of snake antivenom against snake bite is an example of active immunisation
C. If due to some reason B and T lymphocytes are damaged, the body will not produce antibodies against a pathogen
D. Injection of dead/ inactivated pathogens causes passive immunity

Hint: There are two types of immunities- active immunity and passive immunity. Active immunity alludes to the way towards presenting the body to an antigen to create a versatile invulnerable reaction. Passive immunity is the exchange of dynamic humoral invulnerability of instant antibodies.

Complete answer:
The primary and secondary resistant reactions are completed with the assistance of two extraordinary kinds of lymphocytes present in our blood, i.e., B-lymphocytes and T-lymphocytes. The B-lymphocytes produce a cluster (a scope) of proteins because of microbes into our blood to battle with them. These proteins are called antibodies. The T-cells themselves do not emit antibodies however help B-cells to deliver them.
Both T lymphocytes and B lymphocytes are white platelets. They are the particular safe responders (the insusceptible framework can distinguish the trespassers and attack). Both are created by the bone marrow yet develop in better places. T-lymphocytes can slaughter the contaminated cell (Cyto harmful/cell cured insusceptibility) B-lymphocytes produce antibodies that attack the antigens.
So, if due to any reason, B and T-lymphocytes are harmed, the body will not be able to produce antibodies against a pathogen.
So, the correct answer is “Option C”.

Additional Information:
The hepatitis B antibody is made by taking the aspect of the infection that makes surface protein ("surface protein quality") and placing it into yeast cells. The yeast cells at that point produce numerous duplicates of the protein that are in this way used to make the antibody.
Infusion of the snake antibody is a passive vaccination. Passive invulnerability originates from infused antibodies made inside an alternate individual or a creature.
Normally obtained active immunization happens when the individual is presented to a live microbe, builds up the illness, and gets insusceptible because of the essential invulnerable reaction. Consequently, the infusion of dead/inactivated pathogens causes active immunization.

Note:
Immunity is made by two sorts of lymphocytes in human blood, explicitly B-lymphocytes and T-lymphocytes. The invulnerable reaction relies upon B and T cells interfacing with one another to give a successful guard. Immune system microorganisms are the organizers and they animate B cells to partition and emit antibodies into the blood - these antibodies devastate the antigenic microbes and the T cells at that point search out and execute any of the body's own cells. Since our structure is prepared, later on, if antigen enters also, our system can shield adequately with the antibodies recently made. Pathogens are not delivered if B or T-lymphocytes are harmed.