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
[{'content': "Tendency to form multiple pulp stone is a feature of: \nSelect and explain. \nA. Herpes zoster., B. Ehlers danlos syndrome., C. Darrier's disease., D. None.", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]