A building has several rooms and doors as shown in the top view of the building given below. The doors are closed initially.

What is the minimum number of doors that need to be opened in order to go from the point $P$ to the point $Q$?

1. $4$
2. $3$
3. $2$
4. $1$

We need to open only two doors to reach from $\text{P}$ to $\text{Q}.$
$\therefore$ The minimum number of doors that need to be opened in order to go from the point $\text{P}$ to the point $\text{Q}$ is $2.$
Correct Answer $:\text{C}$