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: National emission standards for affected units. Choices:  1. There are no standards for this kind of unit. 2. Affected units are subject to national emission standards. 3. National emission standards are very strict for units like these.

1