Concept:A knave is a dishonest or unscrupulous person. Its antonym must describe someone who is virtuous and honest.Explanation:Knave means a deceitful or untrustworthy man (धोखेबाज़ व्यक्ति). Paragon means a perfect example of virtue or excellence (उत्कृष्ट उदाहरण). These two words have opposite meanings – one implies dishonesty, the other implies ideal goodness. The other options do not provide a direct opposite: Shady can mean suspicious but not the antonym of knave; Fuzzy means unclear; Dark means lacking light. Hence, the correct antonym is Paragon.Answer:Option D (Paragon)