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
[{'content': 'Elastin fiber system present in the lamina propria consists all of these EXCEPT \nSelect and explain. \nA. Oxytalan, B. Elastin, C. Elaunin, D. Collagen', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]