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: Below the three great lakes, Maggiore, Como, and Garda, the fertile plain of the Po river separates the Alps from the rugged chain of the Apennines, running like a wall down the middle of the peninsula to the arid south. Choices:  1. The fertile plain of the Po river separates the Alps from Apennines. 2. Po river is a rather long river compared with Mississippi river. 3. Po river is below only 1 great lake, Como.

3