The graph below shows the number of vehicles passing through a road crossing in Long Lake Road, in the city of Troy, Michigan, in different time intervals on a particular day. Read the bar graph and answer the questions given below.What is the total number of vehicles passing through the minimum traffic hour and maximum traffic hours ?

Question

$\begin{array}{1 1} (a)\;100\\ (b)\;400 \\ (c)\;500 \\ (d)\;450\end{array}$