Pearl is a hard object produced within the soft tissues of a mollusk. – McqOptions

MCQOPTIONS

1.	Pearl is a hard object produced within the soft tissues of a mollusk. Which oneof the following is the main constituentof pearl?
A.	Calcium carbonate
B.	Calcium oxide
C.	Calcium nitrate
D.	Calcium sulphate
Answer» B. Calcium oxide

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