Multiple choice D2h point group means ____________. 2 C2's and 1 horizontal plane 2 C2's and 2 horizontal planes 1 C2 and 1 horizontal plane 1 C2, 2 C2's perpendicular to C2 and 1 horizontal plane 1 C2, 1 C2 perpendicular to C2 and 1 horizontal plane Reveal answer Fill a bubble to check yourself D Correct answer Explanation Correct option: 1 C2, 2 C2's perpendicular to C2 and 1 horizontal plane are required for point group to be D2h.