1. I alone is sufficient while II alone is not sufficient
  2. II alone is sufficient while I alone is not sufficient
  3. Either I or II is sufficient
  4. Neither I nor II is sufficient
  5. Both I and II are sufficient
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Answer: Option 4

From I, we have: R>Q, R>T, S>R i.e. S>R>Q>T or S>R>T>Q. From II, S is not the heaviest. So, P is the heaviest. Thus, we have: P > S > R > Q > T or P > S > R > T > Q. Hence, either T or Q is the lightest.

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