Class 8 Science MCQs – Certification Test 198

Micro-organisms and Viruses MCQs (Question 198) – Study App & e-Book Download

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MCQ 198: The introduction of dead or weak germs in to body orally or by injection to train body to fight the real germs on attack is called:

vaccination
immunization
both a and b
infecting

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Micro-organisms and Viruses MCQs App & e-Book – Class 8 Science Placement Tests

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