Answer:
The correct answer is- nasopharynx.
Step-by-step explanation:
There are three sections of pharynx according to their position. The uppermost portion is called nasopharynx the middle portion is oropharynx and the lower portion is laryngopharynx.
Nasopharynx which joins trachea to nose is the connection between the nasal cavity and the pharynx. Nasopharynx is separated from the oropharynx by the soft palate that is present on the back roof of the mouth.
Air passes through via nasopharynx to lungs and it remains open even if the muscles in its surrounding get relaxed to respire in a continuous manner. So the right answer is nasopharynx.