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: He crossed the mountain rivers that roared down from the mountains of the west. Choices:  1. He was traveling in the mountains. 2. He was traveling in the Rocky Mountains. 3. He was walking in the desert.

3