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Inventions MCQs – Certification Test 138

Loudspeaker MCQs (Question 138) – Learning App & e-Book Download

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MCQ 138: In which one of the following year, a loudspeaker was invented?

  1. 1876
  2. 1850
  3. 1866
  4. 1898
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8th Class Science Test Questions

8th Class Science Quiz with Answers