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': 'Epidermolysis Bullosa simplex is because of defect in: \nSelect and explain. \nA. Collagen 7, B. Keratin 5 and Keratin 14, C. Laminin, D. BP1 and BP2', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Epidermolysis Bullosa simplex : defect in K5 and K14\nEpidermolysis Bullosa Junctionalis : defect in Laminin\nEpidermolysis Bullosa\xa0 Dystrophica : defect in collagen 7\nEpidermolysis Bullosa Acquisita : absence of collagen 7', 'role': 'assistant'}]