Correct Option: C

The Sunderban forest lies in the vast delta on the Bay of Bengal formed by the super confluence of the Padma, Brahmaputra and Meghna rivers across southern Bangladesh. The seasonally flooded Sundarbans freshwater swamp forests lie inland from the mangrove forests on the coastal fringe. The forest covers 10,000 km² . of which about 6,000 are in Bangladesh. It became inscribed as a UNESCO world heritage site in 1997.