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: In a given test, all organisms should be approximately the same age and should be taken from the same source. Choices:  1. If this rule is not followed it can easily mess up results. 2. It is not necessary to take organisms from the same source and age when conducting a test. 3. All organisms should come from the same place and be approximately the same age in a given test.

2