A white number plate reading MH 12 has a blue strip at its left end. Which panel shows the plate in the dashed mirror?

The strip moves to the right end, the characters come in the order 2 1 H M, and the 1 and the 2 are flipped (M and H are symmetric): (a). (b) forgets to flip the 2, (d) is the plate itself and (c) is upside down.