Context: I recently tore the cartilage in my right knee , and had surgery . I was prescribed Hydrocodone for the pain before the surgery but complained about not being able to sleep . So after the surgery my Dr. prescribed Oxycodone .

Question: What must have happened before the person required surgery ?
Options:
0. Their finger was cut off in an industrial accident .
1. They broke their ankle in a fall .
2. None of the above choices .
3. They badly injured their knee .
Answer: 3