we know that
The plane on the bottom of the figure contains points E,F,G and H
The plane on the top of the figure contains points A, B, C and D
The plane on the front side of the figure contains points C,D,G and H
The plane that passes at the slant through the figure is not clear, contains points C,B,G and F or A,D,E and H
therefore
the answer is
The plane on the front side of the figure contains points C,D,G
