The clocks show times that follow a pattern (long orange hand for minutes, short dark hand for hours; the dots mark 12, 3, 6 and 9). Which clock comes next?

The clocks show 1:10, 2:30, 3:50 and 5:10, so the time moves on by 1 hour 20 minutes each step. The next time is 6:30: the minute hand points straight down at 6 and the hour hand sits halfway between 6 and 7: (b). (a) shows 7:30, (c) 6:50 and (d) 6:10.