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: How should I know?  Choices:  1. Yes, of course I do know.  2. How do you expect me to understand that? 3. I have that knowledge, I am just not admitting to it. 

1