Multiple choice questions XXXXXIII — task. Science CBSE, Class 9.

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1. Select the incorrect statement.

Tetanus is caused by a rod shaped bacterium
First vaccine was formed by Edward Jenner
Vaccines are preparations of antigenic proteins which generate permanent passive immunity against all pathogens.
DPT is a vaccine that provides immunity for three different diseases

2. Select the intrinsic disease causing factor among the following.

Environmental pollutants
Microorganisms
Inadequate diet
Abnormal hormone secretion

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