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: Concentration-Response Functions for PM-related Premature Mortality Choices:  1. Concentration-Response Functions have no relation to PM-related Premature Mortality. 2. There are also 2 other functions that can be used for PM-related Premature Mortality. 3. The function for PM-related Premature Mortality is Concentration-Response.

1