A violet block shaped like a fallen L carries a dot and a small yellow triangle. Which panel shows the block in the dashed mirror?

The long arm runs along the top and the short foot hangs down on the LEFT; in the mirror the foot hangs down on the RIGHT, the dot moves into that foot, and the triangle's right angle moves to the top-left: (d). (c) is the block itself, (b) has the foot pointing up, and (a) stands the block upright.