How is nacre, the technical term for an extract from the inside of a shell, better known as?

Correct option is B

The correct answer is (b) Mother-of-pearl.
· Nacre, also known as mother-of-pearl, is an iridescent substance that forms the inner layer of the shells of some mollusks, such as oysters and abalones.
· It is composed of calcium carbonate in a crystalline form, which is secreted by the mollusk to line the inner shell and protect it from parasites and debris.
· Nacre is highly valued for its beauty and is used in jewelry, decoration, and musical instruments due to its luster and iridescence.
Information Booster:
· Garnet: A group of silicate minerals used as gemstones and abrasives, not related to nacre.
· Opal: A hydrated amorphous form of silica, known for its play of color, different from nacre.
· Onyx: A banded variety of the mineral chalcedony, used in jewelry and carvings, not related to nacre.