CREATE TABLE table_204_6 (id DECIMAL, "category" TEXT, "urban settlements" TEXT, "population" DECIMAL, "male" TEXT, "female" TEXT, "inhabited localities in jurisdiction" TEXT)

which rural settlement has the most males in their population ?
SELECT "urban settlements" FROM table_204_6 WHERE "category" = 'rural' ORDER BY "male" DESC LIMIT 1
SELECT "urban settlements" FROM "table_204_6" WHERE "category" = 'rural' ORDER BY "male" DESC NULLS LAST LIMIT 1