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
Which of the following is a feature of papillon lefevre
syndrome? 
Select and explain. 
A. destructive periodontitis, B. palmar-plantar keratosis, C. calcification of dura, D. all the above
D: all the above
Answer: D: all the above 
Explanation: None