Which one of the following is the best example of repeated falls in sea level, giving rise to present-day extensive marshland?

1. A

   Bhitarkanika Mangroves

   Bhitarkanika. A mangrove delta on the Brahmani–Baitarani, not a classic emerged marsh from repeated sea-level fall.

2. B

   Marakkanam Salt Pans

   Marakkanam salt pans. Coastal salt works in Tamil Nadu.

3. C

   Naupada Swamp

   Naupada swamp. A coastal wetland in Andhra, not the textbook emerged Rann.

4. D

   Rann of Kutch

   Rann of Kutch. A vast seasonal salt marsh on a surface repeatedly exposed as sea level fell.

Summary. Official key is (d) Rann of Kutch. It is a residual of the Arabian Sea: repeated falls of sea level left an extensive saline marsh, flooded in the monsoon and a salt flat in the dry season. The other three are coastal wetlands or salt pans of a different origin.