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: Anatomy
Approximate distance of diphragmatic constriction from nostril & incisor are 
Select and explain. 
A. 7" & 6", B. 11' & 10", C. 17" & 16", D. 23" & 22"
C: 17" & 16"
Answer: C: 17" & 16" 
Explanation: C i.e. 17" & 16"