Inventions e-Book's MCQs - Complete
Polygraph Quiz App Download & e-Book - 183
Apps:
MCQ:
In which one of the following year, Polygraph was patented?
- 1965
- 1972
- 1918
- 1921
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Inventions App & e-Book Tests PDF Download
Electric Elevator MCQs
Petrol Engine MCQs
String Trimmer MCQs
Capacitors MCQs
Teflon MCQs
Sleeping Car MCQs
World Wide Web MCQs
Freon MCQs
Electrophotograph MCQs
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General Knowledge MCQs eBook Download
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8th Grade Science Quiz with Answers
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