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Railways R.R.C. (Kolkata) Solved Paper Held on 2nd Shift 9-11-2014

  • question_answer
    For the formation of chlorophyll, which of the following two elements are needed?

    A) Sodium and Copper

    B) Calcium and Potassium

    C) Iron and Calsium

    D) Iron and Magnesium

    Correct Answer: D

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