Read the following premise and pick the correct choice. Then, respond with which of the choices is correct.
Premise: I was confused by the professor's lecture.

Choice 1: I paid attention to the professor.
Choice 2: I asked the professor questions.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
1. (The premise states that the person was confused, which is the opposite of paying attention.)