CREATE TABLE table_25049 ("Rank Subcontinent" FLOAT, "Rank Asia" FLOAT, "Rank World" FLOAT, "Country" TEXT, "2011 GDP  ( PPP )  billions of USD" TEXT)

Name the least rank subcontinent for bangladesh
SELECT MIN("Rank Subcontinent") FROM table_25049 WHERE "Country" = 'Bangladesh'
SELECT MIN("Rank Subcontinent") FROM "table_25049" WHERE "Country" = 'Bangladesh'