MCQ
Pertussis can be prevented by the vaccine:
- APenicillin.
- BStreptomycin.
- ✓$DPT.$
- DNone of the above.
$DPT$ is a class of combination vaccines against three infectious diseases in humans: diphtheria, pertussis, and tetanus.
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50. Which of the following can sometimes be 'zero' for a moving body?