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Inventions MCQs – Certification Test 338

Sound recording MCQs (Question 338) – Learning App & e-Book Download

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MCQ 338: Sound recording was invented by an American businessman named as:

  1. Sir Norman Rolston
  2. Sir Thomas Edison
  3. Sir James Hillier
  4. Dr Dennis Colonello
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Sound recording MCQs App & e-Book – Inventions Exam Prep

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General Knowledge e-Book PDF

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8th Class Science Test Questions

8th Class Science Quiz with Answers