what conference has won the most national championships in football?
['Ivy League – 46 National Championships.', 'Big Ten – 39 National Championships. ... ', 'SEC – 29 National Championships. ... ', 'ACC – 18 National Championships. ... ', 'Independents – 17 National Championships. ... ', 'Pac-12 – 15 National Championships. ... ', 'Big 12 – 11 National Championships. ... ']