Definition: In this task, you're given a statement, and three sentences as choices. Your job is to determine which sentence clearly disagrees with the statement. Indicate your answer as '1', '2', or '3' corresponding to the choice number of the selected sentence.
Input: Statement: Figure 7. Projected Marginal Cost of SO2 Reductions ($/Ton) Choices:  1. In the Figure 20, Projected Marginal Cost of SO2 Reductions ($/Time) 2. In the Figure 7, Projected Marginal Cost of SO2 Reductions ($/Ton) 3. In the Figure 7, Projected Marginal Cost of SO2 Reductions ($/Ton)- which is what has to be studied, according to the teacher.

1