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Low tropical islands of coral reefs surrounding a central depression are:
ATrenches
BAtolls
CGuyots
DSeamounts
Answer & Solution
Correct answer: B. Atolls
1. The depression may be a lagoon.
2. These are atolls.
3. Water inside may be fresh, brackish or saline.
_Source: NCERT Class 11 Fundamentals of Physical Geography, Chapter 13, Water (Oceans)._
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