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: There are also several other combinations that may be used, including combinations of ACI with spray dryer and FF and combinations of ACI with FGD. Choices:  1. The combination of ACI with FGD is the most effective 2. There are many other combinations that can be used. 3. There is only one combination available. 

3