CREATE TABLE table_25096 ("Post" FLOAT, "Horse name" TEXT, "Trainer" TEXT, "Jockey" TEXT, "Opening Odds" TEXT, "Starting Odds" TEXT, "Finishing Pos." FLOAT)

Who was the jockey with opening odds of 4-1?
SELECT "Jockey" FROM table_25096 WHERE "Opening Odds" = '4-1'
SELECT "Jockey" FROM "table_25096" WHERE "Opening Odds" = '4-1'