A clock is set to the right time at 4:00 AM on Thursday. If it gains 20 seconds in every 3 hours, then what is the time shown on the clock at 8:30 PM on Friday night?
1
8 hours 34 minutes PM
2
9 hours 34 minutes PM
3
8 hours 34 minutes 30 seconds PM
4
8 hours 30 minutes 30 seconds PM