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: Of course, the one tax concept that we all understand is an audit. Choices:  1. Of course, the concept we all understand regarding taxes is the audit because of how many times we've all been audited. 2. Of course, the concept we all can't fully understand regarding taxes is the audit. 3. Of course, the concept we all understand regarding taxes is the audit.

2