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: Catalyst is discussed in Section 6.4. Choices:  1. Section 6.4 discusses catalysts. 2. Catalyst is not discussed. 3. Catalyst is discussed.

2