A clock is set right at 5 a.m. The clock loses 16 minutes in 24 hours. What will be the true time when the clock indicates 10 p.m. on 4th day?

The correct option is A 11 p.m.
The clock loses 16 minutes in 24 hours => 60 minutes in 90 hours
89 hours of this clock = 90 hours in an accurate clock
Time from 5 a.m. to 10 p.m. of 4^th day = 72+12+5 = 89 hours
Which means 90 hours have passed originally. So, the correct time now is 11 p.m.