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.
Q: Statement: this is you know Choices:  1. This is it, you understand. 2. This is what I was talking about. 3. This is not it, you get it?
A: 
3