The sentence that most clearly uses allusion in the given options is comparing Jon to 'Yoda,' referencing the wise character from Star Wars.
Allusion is a literary device that involves referencing another work of art, culture, or historical event. In the sentence 'When it comes to giving people good advice, Jon is a regular Yoda,' the term 'Yoda' is an allusion to Star Wars, specifically referring to someone wise or knowledgeable.
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