Question

The group of island formed by corals is
(A) Andaman
(B) Nicobar
(C) Lakshadweep
(D) St Mary’s

Answer 1

Hint: We should know that Corals are marine invertebrates within the class Anthozoa of the phylum Cnidaria. They typically live in compact colonies of many identical individual polyps. Coral species include the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton. And unlike plants, corals do not make their own food. Corals are in fact animals. The branch or mound that we often call a coral is actually made up of thousands of tiny animals called polyps. A coral polyp is an invertebrate that can be no bigger than a pinhead to up to a foot in diameter.

Complete step-by step answer
We should know that Lakshadweep, formerly (1956–73) Laccadive, Minicoy, and Amindivi Islands, union territory of India. It is a group of some three dozen islands scattered over some 30,000 square miles (78,000 square km) of the Arabian Sea off the southwestern coast of India. Lakshadweep Island can be reached by ships and flights operated from Kochi. For all tourist purposes Kochi is the gateway to Lakshadweep. Agatti and Bangaram islands can be reached by flight from Kochi. Indian Airlines operate flights from Kochi.
It should be known to us that India's smallest Union Territory Lakshadweep is an archipelago consisting of 36 islands with an area of 32 sq km. It is a uni-district Union Territory and comprises 12 atolls, three reefs, five submerged banks and ten inhabited islands.
Lakshadweep islands are formed by the coral reefs which are a type of atoll. Lakshadweep islands are known as Indian’s coral islands.

Hence, the correct answer is Option C.

Note: We should know that the three main types of coral reefs are fringing, barrier, and atoll. Schools of colorful pennantfish, pyramid, and milletseed butterflyfish live on an atoll reef in the Northwestern Hawaiian Islands. The most common type of reef is the fringing reef. Coral reefs technically do not move. Corals themselves are sessile creatures, meaning they are immobile and stationed to the same spot. They reproduce sexually, releasing eggs and sperm into the water, where baby corals are created before landing and settling.
It should be known to us that scientists generally divide coral reefs into four classes: fringing reefs, barrier reefs, atolls, and patch reefs. Fringing reefs grow near the coastline around islands and continents. They are separated from the shore by narrow, shallow lagoons.