Anonymous For the answer, which question is suitable? The question and answer are both unnatural as a conversation. I cannot imagine how that would ever come up.
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AnonymousFor the answer, which question is suitable?The question and answer are both unnatural as a conversation. I cannot imagine how that would ever come up. Nevertheless, all three are grammatical if you preface 'foolish' with an indefinite article in #3.
AnonymousWhat is natural as a conversation?They are all equally appropriate.