|A) If the data in statement I alone are sufficient to answer the question||B) If the data in statement II alone are sufficient answer the question|
|C) If the data either in I or II alone are sufficient to answer the question;||D) If the data in both the statements together are needed.|
From I, we have : D > A , D> C,
From II, we have : E >B > D.
Combining the above two, we get : E > B> D> (A and C).
So, E is the tallest.
Clearly, both the statements are needed to answer the question