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Railways R.R.C. (Jabalpur) Solved Paper Held on 1st Shift 30-11-2014

  • question_answer
    Ultra Violet light of sun's radiation is prevented from reaching the earth's atmosphere by the layer of-

    A) Helium             

    B) Ozone

    C) Hydrogen                      

    D) Oxygen

    Correct Answer: B

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