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: LC50s for flow-through tests with Mysidopsis bahia and Cyprinodon variegatus were calculated two different ways -- (1) on the basis of the nominal toxicant concentrations (Nom), and (2) on the basis of measured (Meas) toxicant concentrations. Choices:  1. One of the ways LC50s were calculated was with nomincal toxicant concentrations. 2. Mysidopsis bahia and Cyprinodon variegatus contain toxins. 3. Toxins are great for the body.

3