Question

Nacre is

• A. Reduced shell of Limax
• B. Sea foam
• C. Smallest mollusc
• D. Pearly material

Answer 1

The correct option is A Reduced shell of Limax

D. Pearly material

Reason: Nacre is commonly known as mother of pearl. It is an organic–inorganic composite material produced by some molluscs as an inner shell layer. It is also the material of which pearls are made of. It is strong, resilient, and iridescent. Nacre is composed mainly of aragonite (a crystallographic form of Calcium carbonate) and a small amount of organic substances.