Which is not a type of reef from the following?

Correct option is B

Ridge reefs is the correct answer as it is not a recognized type of reef. The primary types of coral reefs include fringing reefs, barrier reefs, and atolls.
Information Booster:
1. Fringing reefs are the most commonly occurring reefs and grow close to shorelines.
2. Barrier reefs can protect coastlines from erosion by absorbing wave energy.
3. Atolls form unique ring shapes around lagoons and are mostly found in tropical oceans.
4. Coral reefs play a critical role in marine biodiversity, providing habitat and protection to various marine species.
5. They serve as natural barriers, reducing the impact of waves and protecting coastal communities.