This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
Nasal width/length ratio is: 
Select and explain. 
A. 62.50%, B. 70%, C. 65%, D. 66%
B: 70%
Answer: B: 70% 
Explanation: Nasal index is the ratio of nasal width to nasal height multiplied by 100. 
The nose has been classified into three major groups based on the nasal parameters:

Leptorrhine or fine nose (nasal index of 69.9 or less)
Mesorrhine or medium (nasal index of 70.0 – 84.9)
Platyrrhine or broad nose (nasal index of 85.0 or more)