A musical concert started at 9:30 am. The concert lasted for around 1 hour 50 minutes. There was an interval of about 25 minutes. What time did the concert end?

Question

$\begin{array}{11} (a)\; 10:45 am \\ (b)\; 11:20 am \\ (c)\; 11:45 am \\ (d) 12:00pm \end{array}$