SELECT u15_4th_quad FROM table_name_68 WHERE u15_3rd_quad = "bbc" AND u15_6th_quad = "gt"
U15 Quad ke -4 mana yang memiliki quad ke -3 U15 dari BBC dan U15 6th Quad of GT?
CREATE TABLE table_name_68 (u15_4th_quad VARCHAR, u15_3rd_quad VARCHAR, u15_6th_quad VARCHAR)