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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-9

  • question_answer
    Which is the main constituent of bones and teeth?

    A)  Calcium           

    B)  Phosphorus

    C)  Sulphur

    D)  Iron

    Correct Answer: A

    Solution :

    Calcium is a major constituent of teeth and bones. Its main source are milk, egg etc.


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