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: For this reason, the use of early life stages, such as larval fish, is required for all tests. Choices:  1. In all tests, early life stages are a mandatory component. 2. The requirement to include the early life stages is decided on a case by case basis. 3. The early life stages provide necessary insights into the development of the specimen.

2