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Four persons: P, Q, R and S are in police custody and one of them has committed a crime. They confess as follows: A. Person P: Q did it. B. Person Q: S did it. C. Person R: I did not do it. D. Person S: Q lied. If exactly one of the statements is false, which of the following is the guilty person. | Watch the step-by-step video solution for this NIMCET PYQ.