An old key lies flat with its ring on the left and its two teeth pointing down. A dot marks a hole above the ring. Which panel is its mirror image?

Left and right swap but up and down do not: the ring with the hole above it goes to the right, the shaft points left and the teeth still hang DOWN: (b). (c) has the teeth pointing up, (d) is the key turned half-way round, and (a) stands the key on end.