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: But I don't believe that. Choices:  1. But I think it is not true at all. 2. But I have doubts about that. 3. But I completely buy it.

3