Multiple choice The Ganges-Brahmaputra Delta is the second largest delta in the world houses the most biodiversity in the world is the largest delta in the world is the smallest delta in the world Reveal answer Fill a bubble to check yourself C Correct answer Explanation The Ganges-Brahmaputra Delta is the largest delta in the world. It empties into the Bay of Bengal. It is also one of the most fertile regions in the world, thereby earning the nickname 'The Green Delta'.