Which 可不可以引导名词性从句？？

尽管which通常都引导关系从句，也就是定语从句，但引导名词性从句也是可以的。
举个很简单的例子：
I'll ask him which one he likes.就是which引导的名词性从句，作ask的双宾语。

可以啊！比如主语从句which person he will choose to attend the meeting is still unknown。
同位语从句this is my question which one is the correct answer

下面的回答：him作间宾，从句作直宾