Let p: Lenlen is telling the truth, q: Narcos is telling a lie. and r. Zero is a positive number. What is the symbol for "Narcos is telling the truth if and only if Lenlen is telling the truth and Zero is a positive number." a.~q (p^r) b. ~q (p^~r) c.q (p^r) d. ~q (~p^r) a O b с

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