In mammals,the tracheal cartilaginous rings are

The cartilage of Santorini is a band on which of the following?

Pleural membrane is the covering of

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

Adam's apple is another name for

The figure shows a diagrammatic view of the human respiratory system with labels $A, B, C$,and $D$. Select the option which gives the correct identification and main function and/or characteristic.