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      Question

      Lightyearisaunitof-

      A time Correct Answer Incorrect Answer
      B distance Correct Answer Incorrect Answer
      C light Correct Answer Incorrect Answer
      D intensity of light Correct Answer Incorrect Answer

      Solution

      A light-year is a unit of distance. Itisthedistancethatlightcantravelinoneyear. Light moves at a velocity of about 300,000 kilometers (km) each second.

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