Inventions MCQs (Grade 8) From Textbook
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Inventions MCQs – Mock Test 142
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The process to extract helium from natural gas was invented by
Light Bulb was discovered by an American inventor named as
In which one of the following countries, the production process was discovered?
Cholera vaccine was invented by a Jewish bacteriologist known as
Which one of them is considered as the record breaking inventor of 40 Vaccines?
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