CREATE TABLE table_204_683 (id NUMBER, "no." NUMBER, "constituency" CLOB, "winner candidate" CLOB, "party" CLOB, "votes" NUMBER, "margin" NUMBER)

what constituency comes immediately before palanpur ?
SELECT "constituency" FROM table_204_683 WHERE "no." = (SELECT "no." FROM table_204_683 WHERE "constituency" = 'palanpur') - 1
SELECT "constituency" FROM "table_204_683" WHERE "no." = (SELECT "no." FROM "table_204_683" WHERE "constituency" = 'palanpur') - 1