Solution:

Rotate (B) anout the axis though the centre of the front face, rotate (D) about the axis through the centre of the top face, and rotate ( E ) about the asix through the center of the right face. Then the front face and the right faces are as in (A). The top face of each of (A), (D) and (E) is blank, which is wrong. The triangle in the top face of (C) is pointing in the wrong direction. Hence the correct choice is (B)