CREATE TABLE table_4158 ("Result" TEXT, "No." FLOAT, "Date" TEXT, "Category" TEXT, "Tournament" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponents" TEXT, "Score" TEXT)

In the 250 series on clay what were the scores?
SELECT "Score" FROM table_4158 WHERE "Surface" = 'Clay' AND "Category" = '250 series'
SELECT "Score" FROM "table_4158" WHERE "Category" = '250 series' AND "Surface" = 'Clay'