Among four friends W, X, Y and Z (each having different number of cookies), who has the most number of cookies?
I. W has lesser number of cookies than Z. Y does not have the most number of cookies.
II. W has more cookies than Y. X does not have the most number of cookies.

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

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

The data even in both statements I and II together are not sufficient to answer the question.

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

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