The dot moves from corner to corner, and the arrow in the middle always turns to point at it. Which figure comes next?

The dot moves one corner clockwise each step (top-left, top-right, bottom-right, bottom-left) and the arrow turns with it, a quarter turn clockwise each time. Next the dot is back in the top-left corner and the arrow points at it, up and to the left: (a). (b) points the arrow away from the dot, (c) moves the dot the wrong way and (d) leaves the dot behind.