CREATE TABLE table_53298 ("D 50 O" TEXT, "D 49 \\u221a" TEXT, "D 48 \\u221a" TEXT, "D 47 \\u221a" TEXT, "D 46 \\u221a" TEXT, "D 45 \\u221a" TEXT, "D 44 \\u221a" TEXT, "D 43 \\u221a" TEXT, "D 42 \\u221a" TEXT, "D 41 \\u221a" TEXT)

Name the D 45 when it has D 41 of r 20
SELECT "D 45 \u221a" FROM table_53298 WHERE "D 41 \u221a" = 'r 20'
SELECT "D 45 \u221a" FROM "table_53298" WHERE "D 41 \u221a" = 'r 20'