Which city is to the North-east of City A?

I. City B is to North of city A, Cities C and D are to the East and West of City B respectively.

II. City M is to the South of City A and City E is to the East of City M, city P is to the North of City M.

Data in I alone are sufficient to answer the question

I. City B is to North of city A, Cities C and D are to the East and West of City B respectively.

From this statement, we can conclude that City B is north of City A. Since cities C and D are east and west of City B, respectively, it means that City C is east of City A, and City D is west of City A.

Since City B is north of City A, and Cities C and D are on either side of City B, it means that Cities C and D must be on either side of City A as well.

This implies that the city north-east of City A is either City C or the one that is north of City B (which is not mentioned).

However, we can conclude that there is a city north-east of City A without knowing its exact identity.

Thus, Data in I alone are sufficient to answer the question.