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      Question

      When is World Metrology Day celebrated

      annually?
      A January 1 Correct Answer Incorrect Answer
      B May 20 Correct Answer Incorrect Answer
      C September 15 Correct Answer Incorrect Answer
      D October 31 Correct Answer Incorrect Answer
      E December 25 Correct Answer Incorrect Answer

      Solution

      World Metrology Day is celebrated annually on May 20. It marks the anniversary of the signing of the Metre Convention in 1875, which established the International System of Units (SI) and ensures worldwide uniformity in measurements.Β 

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