Traffic light with three colours Learning App | Inventions MCQs e-Book PDF
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Inventions MCQs – Certification Test 142

Traffic light with three colours MCQs (Question 142) – Learning App & e-Book Download

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MCQ 142: Which one of the following invents the traffic lights with three colors?

  1. Sir William Potts
  2. Dr Dennis Colonello
  3. Dr Larry wang
  4. Sir Norman Rolston

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