One figure in the middle of this series is missing. The orange dot moves round the corners and the blue arrow follows it. Which figure fills the gap?

The dot moves one corner clockwise each time (top-left, top-right, ?, bottom-left, top-left) and the arrow in the middle always points at the dot. So the missing figure has the dot in the bottom-right corner with the arrow pointing down-right: (b). (a) points the arrow away from the dot, (c) repeats the next figure and (d) points the arrow at the top-right.