Q231
Select the correct statements regarding the characteristics of acquired immunity. 1. Cell-mediated immunity is responsible for acquired immunity. 2. It produces a primary response of low intensity. 3. Active and passive immunity are types of acquired immunity. 4. Polymorphonuclear leucocytes and natural killer cells are involved in acquired immunity.
A.
1, 2 and 3
AnswerB.
1, 3 and 4
C.
1 and 4
D.
1 and 3
Answer: Option A
Solution
Answer: Option A
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