Who invented the headphones?
- Guglielmo Marconi
- Elisha Otis
- Nathaniel Baldwin
- Lewis Waterman
The Miraculous Invention - World Transformation. (Part - 2)
"Miraculous Invention" I have brought a quiz second part under the name of this quiz . I would also like to thank all of you who are playing this quiz . Along with this , I bow down to those great personalities or scientists who dedicated their life .
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