CREATE TABLE table_name_17 (set_2 VARCHAR2, set_1 VARCHAR2, set_4 VARCHAR2)

What is the set 2 the has 1 set of 21-25, and 4 sets of 25-20?
SELECT set_2 FROM table_name_17 WHERE set_1 = "21-25" AND set_4 = "25-20"
SELECT "set_2" FROM "table_name_17" WHERE "21-25" = "set_1" AND "25-20" = "set_4"