The main constituents of pearls are
  • 1Calcium Oxide and Ammonium Chloride
  • 2Calcium Carbonate and Magnesium Carbonate
  • 3Aragonite and Conchiolin
  • 4Ammonium Sulphate and Sodium Carbonate
Answer:- 1
Explanation:-

Solution:
Calcium Carbonate and Magnesium Carbonate.

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