Is a tuple, that includes a list actually mutable?
I saw a checklist type quiz. It asked to choose all the mutable objects from a list. There was a tuple with list as item. I included it, because it's inner element can be changed and thus mutable, that caused the result to be wrong. I later checked the right answers and it was not selected as right answer. Is the quiz or I wrong? Is an immutable iterator with mutable item mutable or immutable?