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Inventions Competitive Exam: Certification Test 587

A.C MCQ App & e-Book: MCQ 587

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MCQ: 587

Which one of the following invents AC?

  1. Sir Willis H.Carrier
  2. Sir Jack Kilby
  3. Sir Schuyler Skaats Wheeler
  4. Sir Walter Brattain
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8th Class Science Test Questions

8th Class Science Quiz with Answers