Question

Match the type of immunity listed in column I with the examples listed in column II. Choose the answer that gives the correct combination of alphabets of the two columns.

	Types Of imminity		Example
A	Natural, active	p	Immunity developed by heredity
B	Artifical, passive	q	From mother to foetus through placenta
C	Artificial, active	r	Injection of antiserum to travelers
D	Natural, passive	s	Fighting infections naturally
		t	Induced by vaccination

• A. A- s, B- t, C- q, D- r
• B. A- t, B- s, C- r, D- p
• C. A- p, B- q, C- r, D- t
• D. A- s, B- r, C- t, D- q

Answer 1

The correct option is D A- s, B- r, C- t, D- q

Natural active immunity occurs when the person is exposed to a live pathogen, develops the disease and becomes immune as a result of primary response.
Artificial passive immunity is a short-term immunization by the injection of antibodies that are not produced by the recipient's cells.
Artificial active immunity can be induced by a vaccine.
Natural passive immunity occurs during pregnancy, in which certain antibodies are passed from the maternal into the fetal bloodstream. Thus, the correct answer is option D.