question_answer

Select the number of correct statement with respect to disease and immunisation:

[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