Which answer in this list is the correct answer to this question? (2017)
answer - https://math.stackexchange.com/a/3437700/725808The question displays a lack of understanding of language, especially the relation between a word and its meaning. More specifically, the relation between a noun and its pronoun.Suppose Question 1 was:> "What day is it today?"And suppose Question 2 was:> "Which answer in this list is the correct answer to this question?
> Friday, Saturday, Sunday"If someone asks, 'What question is the pronoun "this" in Question 2 referring to?'Then you can reply - 'Question 1'And then they can proceed to answer Question 2 as 'Saturday'Suppose I just ask you out of the blue : 'what's his height?'You will immediately respond : 'who are you talking about?'A pronoun must come AFTER a noun has been established. If it comes before, the speaker must clarify the noun after.In other words, you must be able to do a Ctrl-H Find & Replace in the original sentence, and change "this" to whatever it's referring to, and the new sentence should still make sense. That is the point of pronouns.If I ask 'what is the weather in this city?'Does that question make sense without mentioning the city's name either before or after? It might make sense grammatically, but practically, it is not answerable.If you now come back and say - Just replace the pronoun "this" with the text of the question, then it becomes :"Which answer in this list is the correct answer to "Which answer in this list is the correct answer to this question" question?Is the question answerable now ? Still NO.
Because there is still one unresolved "this".
Ad-infinitum.So, to answer your question:> 'which question ?'The question, as is, is not answerable. Because it does not make sense until you resolve what 'this' refers to. Until then, it is just a bunch of words without a corresponding meaning. It's not a paradox or a contradiction.  
Barber's 'paradox', 'This sentence is false' etc. all are basically just a poor understanding of language/pronouns.You might as well ask :> 'Which answer in this list is the correct answer to oogabooga question?'