If a tiny particle is placed in the pore of a stoma,what will happen?

The outer pleural membrane is in close contact with the .....

The structure which prevents the entry of food into the respiratory tract is

In which of the following is the diaphragm found?

Name the three main parts of the pharynx.

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.