This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics, Subject name: Pathology
[{'content': 'EhlerDanlos syndrome is due to defect in? \nSelect and explain. \nA. Elastin, B. Collagen, C. Keratin, D. Laminin', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. (b) CollagenRef: Robbin's 8th ed ch:3", 'role': 'assistant'}]