Question

Match the columns and find the correct option

	LIST I		LIST II
a	Natural active immunity	i	Develops due to to vaccinaton
b	Natural passive immunity	ii	Antirabies serum
c	Artificial active immunity	iii	Acquired after smallpox infection
d	Artificial passive immunity	iv	Transferred from mother to child

• A. a - iv, b - iii, c - i, d - ii
• B. a - iii, b - i, c - iv, d - ii
• C. a - iii, b - iv, c - i, d - ii
• D. a - iii, b - iv, c - ii, d - i

Answer 1

The correct option is C a - iii, b - iv, c - i, d - ii

• Naturally acquired active immunity occurs when a person is exposed to a live pathogen and develops a primary immune response. An example is acquired after smallpox infection.
• Naturally acquired passive immunity occurs during pregnancy, in which certain antibodies are passed from the maternal blood into the fetal bloodstream in the form of IgG.
• Artificially acquired active immunity can be induced by a vaccine, a substance that contains antigen. An example of artificial active immunity is building up a resistance to a disease due to immunization.
• Artificially acquired passive immunity is a short-term immunization by the injection of antibodies, such as gamma globulin, that is not produced by the recipient's cells. eg: Antirabies serum,
• So, the correct answer is 'a - iii, b - iv, ci, d - ii'.