The clock on the left is placed in front of a mirror. Which of the dials (a)–(d) shows the hands as they appear in the mirror?

The clock shows 2:50. A mirror swaps left and right, so a hand at angle $x$ from 12 appears at 360° − $x$: the minute hand moves from the 10 position to the 2 position and the hour hand from just before 3 to just after 9, i.e. the hands of 9:10. That is dial (c). (a) is the water image, (d) the clock turned upside down, (b) a different time.