This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vestibulobullous disorders, Subject name: Dental
[{'content': 'In congenital dystrophic variety of epidermolysis bullosa, mutation is seen in the gene conding for \nSelect and explain. \nA. Laminin 4, B. Co11agen type 7, C. Alpha 6 integerin, D. Keratin 14', 'role': 'user'}, {'content': "Answer: B \nExplanation: Dystrophic epidermolysis bullosa - collagen type VII Epidermolysis bullosa simplex -keratin 14 Junctional epidermolysis bullosa is an inherited disease affecting laminin and collagen . page no. 287. Reference IADVL's concise textbook of dermatology", 'role': 'assistant'}]