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 old bird's as close as an oyster!  Choices:  1. She used to fail all her classes at least twice. 2. She's just not very smart. 3. She's as smart as a steel trap.

3