Hello,<br/><br/>1. One of my friends is a doctor.<br/><br/>Here "one" is a subject of the sentence and "is" the verb. The subject and verb are in agreement.<br/><br/>2. One of my friends who is a doctor lives in Japan.<br/><br/>Is the (2) correct?<br/><br/>Does "who" stand for "one" or "friends"?<br/><br/>Thanks.