[a] Injection of snake antivenin against snake bite is an example of passive immunisation. |
[b] Injection of dead/inactivated pathogens causes active immunity |
[c] If due to some reason B and T-lymphocytes are damaged, the body will not produce antibodies against a pathogen |
[d] Certain protozoans have been used to mass produce hepatitis B vaccine |
A) 2
B) 3
C) 4
D) 1
Correct Answer: B
Solution :
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