Inventions e-Book's MCQs - Complete
Diptheria MCQs App Free Download & e-Book - 312
Apps:
MCQ:
In which one of the following year, diphtheria vaccine was invented?
- 1924
- 1913
- 1976
- 1903
b
Inventions App & e-Book Tests PDF Download
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General Knowledge MCQs eBook Download
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