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': "A patient comes with emotional problems, \nincreased salivation; pallor of oral mucosa and a\ngrayish blue discoloration of the gingiva. These 'findings are most consistent with a clinical impression of: \nSelect and explain. \nA. Cherubism, B. Cretinism, C. Pierre Robin syndrome, D. Lead poisoning", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]