Which of the four clocks shows a time whose mirror image is exactly 50 minutes BEHIND the clock?

The mirror time is 11:60 minus the time. (a) 6:35 gives 5:25, 70 minutes behind. (b) 6:25 gives 5:35, exactly 50 minutes behind. (c) 5:35 gives 6:25, which is ahead. (d) 7:25 gives 4:35, almost 3 hours behind.