Who amongst P, Q, R, S and T is the heaviest ?
a: Q is heavier than R and T but lighter than only S.
b: R is third from the top when they are arranged in descending order of their weight and is heavier than T and P.

If the data in statement I alone are sufficient to answer the question, while the statement II alone are not sufficient to answer the question.

If the data in statement II alone are sufficient to answer the question, while the statement I alone are not sufficient to answer the question.

If the data either in statement I alone or in statement II alone are sufficient to answer the question.

If the data given in both the statements I and II together are not sufficient to answer the question

If the data in both the statements I and II together are necessary to answer the question.