Identify the sentence with a correctly used non-defining relative clause:
答案解析
**Core Concept:** Non-defining clauses add extra information and use commas.
**Answer Analysis:**
- **B** is correct. The clause 'who lives in Paris' is non-essential (set off by commas) and uses 'who' appropriately.
- **A/C/D** are defining clauses (no commas) and grammatically correct but do not match the question's focus on non-defining clauses.
**Common Mistakes:** Confusing defining/non-defining clauses or misusing commas.
正确答案:B