CREATE TABLE table_43300 ("Name" TEXT, "Years" TEXT, "League a" TEXT, "FA Cup" TEXT, "League Cup" TEXT, "Other b" TEXT, "Total" TEXT)

What shows for the League when the FA Cup is 6 (20)?
SELECT "League a" FROM table_43300 WHERE "FA Cup" = '6 (20)'
SELECT "League a" FROM "table_43300" WHERE "FA Cup" = '6 (20)'