In the following questions, four alternatives are given for the Idiom/Phrase printed in bold in the sentence. Choose the alternative which best expresses the meaning of the Idiom/Phrase.
My father is undoubtedly an arm-chair critic.
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someone who gives advice based on theory not practice
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someone who gives advice based on practice not theory
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someone who never gives advice based on experience
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someone who never gives advice
A.
someone who gives advice based on theory not practice