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: The bay around the mount's granite outcrop has been steadily silting up in recent years, so that it's an island only during very high tides. Choices:  1. The island is very small.  2. The outcrop around the bay is only an island during very high tides.  3. The island has not been silting.

3