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: Unknown
[{'content': "Mutation in Marfan's syndrome is ? \nSelect and explain. \nA. Collagen I, B. Collagen IV, C. Fibrillin I, D. Fibrillin II", 'role': 'user'}, {'content': 'Answer: C \nExplanation: ANSWER: (C) Fibrillin IREF: Management of Genetic Syndromes by Suzanne B. Cassidy Judith E. Allanson Page 513Repeat Pathology 2012 Session 1, June 2011', 'role': 'assistant'}]