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MCQ 401: In which one of the following year, optical fiber was patented?

  1. 1888
  2. 1997
  3. 1899
  4. 1952

MCQ 402: Baby bouncer for prewalking was discovered by:

  1. Sir Jack Kilby
  2. Sir Albert Potts
  3. Sir Olivia Poole
  4. Dr Larry wang

MCQ 403: The optical microscope was invented by:

  1. Sir Zacharias Janssen
  2. Sir Alessandro Volta
  3. Sir Alexander Graham Bell
  4. Sir Michael Faraday

MCQ 404: The first patent for bar code was issued by:

  1. Sir Joseph Woodland Bernard
  2. Sir Samuel W. Francis
  3. Sir Stephen Poplawski
  4. Sir Louis Braille

MCQ 405: In which one of the following year, alkaline storage batteries were invented?

  1. Sir Maurice Hilleman
  2. Sir Peter Williamson
  3. Sir Nikola Tesla
  4. Sir Waldemar Jungner

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