Turbinal bones are present in the

Number of lobes in right and left lungs respectively in human being is

During swallowing,the glottis can be covered by a thin elastic cartilaginous flap called $A$ to prevent the entry of food into the larynx. The trachea is a straight tube extending up to the $B$ cavity,which divides at the level of the $5^{th}$ thoracic vertebra into right and left primary $C$. Choose the correct option for $A, B$,and $C$ from the given four options to complete the above statement with reference to the $NCERT$ textbook.

Where does oxygen finally reach from the lungs?

The total surface area of the alveoli in human lungs is approximately: (in $, m^2$)

The larynx is a modified part of which structure?