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Inventions MCQs – Certification Test 875

Photophone MCQ (Question 875) – Learning App & e-Book Download

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MCQ 875: The photo phone was invented by an American scientist named as:

  1. Sir Alexander Graham Bell
  2. Sir Igory Sikorsky
  3. Dr Abraham Gesner
  4. Sir Oliver Evans
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8th Class Science Test Questions

8th Class Science Quiz with Answers