1. I alone is sufficient while II alone is not sufficient
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2. II alone is sufficient while I alone is not sufficient
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3. Either I or II is sufficient
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4. Neither I nor II is sufficient
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Answer
Answer: Either I or II is sufficient Explanation: From I, we have the order: R, -, P, Q. From II, we have the order: P, Q, T. Clearly, each one of the above two orders indicates that Q is to the immediate right of P.