The number 4725 is painted on a houseboat just above the lake. Which panel shows the number's reflection in the water?

The order 4 7 2 5 stays the same and each digit is flipped top-to-bottom: the 4 has its open part at the bottom, the 7 hangs from a bar at the bottom, and the 2 and the 5 each look like the other: (a). (c) leaves the 5 unflipped, (b) reverses the order, and (d) is a half-turn.