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: That is arsenic ”not strychnine, said Poirot mildly.  Choices:  1. Arsenic and strychnine are the same thing. 2. It was easy to get arsenic and strychnine mixed up. 3. Poirot pointed out that it was not strychnine, but arsenic.

1