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
All of the following are contraindications of serial extraction, except : 
Select and explain. 
A. Open bite., B. Flaring of anterior., C. Severe space deficiency greater than 10 mm., D. Nasal stenosis.
C: Severe space deficiency greater than 10 mm.
Answer: C: Severe space deficiency greater than 10 mm. 
Explanation: None