Fill in the blank (_) in the following sentence from the following choices.
Sentence: Her arm needed a cast, but the leg was left alone; the injury to the _ was trivial.

Choice 1: Her arm needed a cast, but the leg was left alone; the injury to the arm was trivial.
Choice 2: Her arm needed a cast, but the leg was left alone; the injury to the leg was trivial.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
1.