Select the pairs of ratios that form a true proportion. Choose all that apply. A. 3:6 and 5:10 B. four over twelve and six over eighteen C. twenty over five and ten over three D. 24:36 and 8:9Select the pairs of ratios that form a true proportion. Choose all that apply. A. 3:6 and 5:10 B. four over twelve and six over eighteen C. twenty over five and ten over three D. 24:36 and 8:9