Consider the following about Coral Reefs and choose the correct combination from codes given below.

1    Coral reefs are colonies of tiny animals found in marine waters that are rich in nutrients

2.    Indian reef area is estimated to be 2375 sq. km.

3.    The four major coral reef areas identified for conservation and management in India are Gulf of Mannar, Gulf of Kutchh, Andaman and Lakshadweep

4.    Coral restoration can be accomplished with relative ease.

Codes