Which pair of ratios is NOT proportional?
A24/27 and 16/18 c. 6/15 and 8/20
B6/9 and 30/45 d. 20/24 and 15/21
A24/27 and 16/18 c. 6/15 and 8/20
B6/9 and 30/45 d. 20/24 and 15/21