External nostrils → vestibules → nasal chambers → internal nares → naso pharynx → X → larynx → trachea. What is X?
(a) Glottis
(b) Alveoli
(c) Atria
(d) Bronchi
The question was posed to me in semester exam.
The above asked question is from Human Respiratory System in portion Breathing and Exchange of Gases of Biology – Class 11