This problem involves 3 figures, each with its own weight. To solve the problem, you need to express the weight of the 3 figures in terms of 1 of the figures. In this case: 3a = 2b => a = 2/3 b and 3c = 2b => c = 2/3 b. Now you can express the other scale in terms of b and check which answer option has the same relation