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: Gas path for coal-fired boiler with FGD. Choices:  1. The boiler has no FGD. 2. The boiler is coal fired. 3. The boiler is used to heat water.

1