CREATE TABLE table_name_23 (social_sec_leeds VARCHAR(255), season VARCHAR(255), fixtures_sec VARCHAR(255), general_sec VARCHAR(255))
Name the Social Sec Leeds has Fixtures Sec of n/a, and a General Sec of n/a, and the Season of 2005–2006?
    
SQL: SELECT social_sec_leeds FROM table_name_23 WHERE fixtures_sec = "n/a" AND general_sec = "n/a" AND season = "2005–2006"