Jim ,it's so nice of you to help me.--- A You're right B My

B My pleasure（这是我乐意做的事情,引申为“不客气”）,用来回答别人的感谢.根据"It's so nice of you to help me“是表示感谢之意,故答案为B.
You're right>(你是对的）；No problem(没问题）;It's my turn(轮到我了）.
请采纳为“满意答案”.祝进步.