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: Pathology
Tendency to form multiple pulp stone is a feature of: 
Select and explain. 
A. Herpes zoster., B. Ehlers danlos syndrome., C. Darrier's disease., D. None.
B: Ehlers danlos syndrome.
Answer: B: Ehlers danlos syndrome. 
Explanation: None