Square ghij shares a common center with regular hexagon abcdef on a coordinate plane. ab is parallel to gh. if the combined figure rotates clockwise about its center, at which angle of rotation will the image coincide with the preimage?

So the problem asks on which of the following among the choices is the angle of rotation will the image coincide with the pre-image if the square GHIJ shares a common center with regular hexagon ABCDEF on a coordinate place and the best angle of rotation would be 180º.

What are the options