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Free "Traffic light with three colours MCQ" App Download with MCQ: Which one of the following invents the traffic lights with three colors?; with answers: sir william potts, dr dennis colonello, dr larry wang, and sir norman rolston to study inventor biographies. Solve Inventions and Inventors Quiz Questions, download Apple Book (Free Chapter) to access invention educational assistance.

Traffic light with three colours MCQs PDF Download – Prep Test

MCQ 1: 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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