C-11-Q107mediumsingle_mcqIf x:y=2:1x:y = 2:1x:y=2:1 and y:z=2:1y:z = 2:1y:z=2:1, then x:y:z=x:y:z =x:y:z=a4:2:14:2:14:2:1b2:1:12:1:12:1:1c