Question

uCUIUS
Which one of the following can not be used for
preparation of vaccines against plague ?
(1) Avirulent live bacteria
(2) Synthetic capsular polysaccharide material
(3) Heat-killed suspension of virulent bacteria
(4) Formalin-inactivated suspensions of virulent
bacteria​

Answer 1

Answer:

option 3 is wright

because according to ncert

the heat killed bacteria not have active genetic material so it's a correct option

Answer 2

Answer:

option 3 is an correct answer

Explanation:

because.....

heat-killer suspension of

virulent bacteria is a heat

energy are there so it is

not used in UCUIUS