Which of the following pairs of numbers contain like fractions?
A31/2 and 43/4
B3/2 and 2/3
C6/7 and 15/7
D5/6 and 10/12
A31/2 and 43/4
B3/2 and 2/3
C6/7 and 15/7
D5/6 and 10/12