Explanation:

- "On the other hand, what are you doing in my room?" doesn't make sense. It contradicts itself since it's used for contrasting ideas.

- "Excuse me, what are you doing in my room?" is logical. It's polite when addressing an unexpected situation.

- "Look there, what are you doing in my room?" is confusing. "Look there" typically directs attention, not relevant here.

- " Eventually, what are you doing in my room?" is awkward. "Eventually" implies time progression, not suited for sudden situations.

Your answer is "Excuse me," which is the right response for an unexpected room intrusion.