A. B, C, D, and E live in houses 1, 2, 3, 4, and 5 in the same community. It is now known that: ① A and B are not neighbors.② The room number of B is smaller than D.③ The room number of C's house is an even number.④The room number of A is 3 larger than that of Wu. According to the above conditions, which of the following is the room number where Ding lives? ['.', '.', '.', '.']