An orange spoke joins the centre of the hexagon to one of its corners. The spoke moves further each time. Which figure comes next?

The spoke moves clockwise by one corner, then two, then three, so next it moves four corners. From the top corner, four corners clockwise is the lower-left corner: (c). (d) repeats the three-corner move, (a) counts four corners anticlockwise and (b) moves one corner the wrong way.