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     EduGorilla 
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    Which of the following is/are the main constituents of pearls?
    1. Calcium carbonate
    2. Magnesium carbonate
    3. Sodium carbonate

    Options :-

    1. Only 1
    2. Only 2
    3. Only 1 and 2
    4. Only 2 and 3
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Reply To: Which of the following is/are the main constituents of pearls?1. Calcium carbonate2. Magnesium carbo….
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