Narrowest part of the nasal cavity is?

Narrowest part of the nasal cavity is ?
a) Vestibule
b) Choanae
c) Inferior turbinate
d) Middle turbinate
Correct Answer - C
Ans. is ‘c’ i.e., Inferior turbinate [Ref Heidari Z, Mahmoudzadeh-
Sagheb H, Khammar T, Khammar M (May 2009).
“Anthropometric measurements of the external nose in 18-25-
year-old Sistani and Baluch aborigine women in the southeast
of Iran”. Folia Morphol. (Warsz) 68 (2): 88-92]
The internal nasal valve comprises the area bounded by the upper
lateral-cartilage, the septum, the nasal floor, and the anterior head of
the inferior turbinate. In the narrow (leptorrhine) nose, this is the
narrowest portion of the nasal airway