The nasopharynx is a part of the pharynx or throat that lies above the soft palate and connects the nasal cavity to the oropharynx. The glottis is a part of the larynx or voice box that consists of the vocal cords and the opening between them. The trachea is a tube-like structure that connects the larynx to the bronchi of the lungs.

Therefore, option 1) A-trachea, B-lungs is incorrect because the nasopharynx does not open into the trachea, but rather the oropharynx does. Option 2) A-trachea, B-glottis is also incorrect because the nasopharynx does not open into the glottis, which is a narrow opening in the larynx that leads to the trachea. Option 3) A-glottis, B-lungs is also incorrect because the nasopharynx does not lead to the lungs.

Option 4) A-glottis, B-nasal cavity is correct because the nasopharynx opens through the glottis region of the larynx into the nasal cavity, which is the passage behind the nose and above the roof of the mouth. This allows air to pass through the nasopharynx and into the respiratory system.