CREATE TABLE table_204_255 (id DECIMAL, "constituency number" DECIMAL, "name" TEXT, "reserved for  ( sc/st/none ) " TEXT, "district" TEXT, "number of electorates  ( 2009 ) " DECIMAL)

name a constituency that only has 139,110 electorates .
SELECT "name" FROM table_204_255 WHERE "number of electorates (2009)" = 139110
SELECT "name" FROM "table_204_255" WHERE "number of electorates (2009)" = 139110