What is 8: 30 pm + 1 hour and 45 minuets?

8:30 plus 1 hour is 
9:30

9:30 plus 30 mins is 
10:00 

and plus the remaining 15 min

10:15 pm

The answer is 22 15. Add 1h45min to 20 30. First of all add 1h30min to 20 30. It becomes 22 00. From 45min, we already added 30min, we have 15min remaining. Now, add 15 min to 22 00, it becomes 22 15 in 24-hour clock or 10 15 pm.
Hope it helped

2.) is the most sense

Hope this ; )