Correct Answer - Option 3 : 8 hours 34 minutes 30 seconds PM
No. of hours between 4:00 AM on Thursday and 8:30 PM on Friday = 40 hours and 30 minutes
Gain in 3 hours = 20 seconds
Therefore, gain in 1 hour = 20/3 seconds
⇒ gain in 40.5 hours = 270 seconds = 4 minutes 30 seconds
Therefore, the time shown = 8:30 + 4 minutes 30 seconds
Hence, '8 hours 34 minutes 30 seconds PM' is the correct answer.