In this dialog, Student B can respond in a way that agrees or disagrees with Student A's statement about enjoying classical music. Here are some suitable responses:

1. **So do I.** (Expresses agreement)
2. **No, I'm not. It's so boring.** (Expresses disagreement)
3. **No, I won't. I prefer pop.** (Indicates a preference for pop music)
4. **I am, too.** (Also expresses agreement)

The best response would depend on whether Student B shares the same enjoyment of classical music or not. If you want to agree, you could choose either "So do I" or "I am, too." If you want to disagree, select one of the other two options.