I am going to have a party,didn't you know

No,I didn't.你确定？。。。为什么不是yes，如果他问Didn't you know I'm going to a party?那么也回答No吗！？这种问句按实际情况回答，知道就是，Yes, I did.不知道就是No, I didn't.Thoma wants to know. A.where Tina live. B.Where Tina lives是A还是B？B 第三人称单数。