Figure A turns about its centre to give figure B. Turn figure C in exactly the same way. Which figure do you get?

Follow the dot at the arrow's tip: it goes from the top to the lower-right, so the figure turns $135^{\circ }$ clockwise. Turning C by $135^{\circ }$ clockwise makes the flag point to the lower-right, and the yellow square moves from the bottom-left to the top: (d). (a) turns only $90^{\circ }$, (b) turns $180^{\circ }$ and (c) turns anticlockwise.