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
Juvenile periodontitis is a 
Select and explain. 
A. Definite genetic disease, B. Immunological defect, C. Neutrophil chemotactic defect, D. Neutrophil adhesion defect
C: Neutrophil chemotactic defect
Answer: C: Neutrophil chemotactic defect 
Explanation: None