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: Medicine
[{'content': 'Locus heterogeneity is a feature of which of the following? \nSelect and explain. \nA. Familial adenomatous polyposis, B. MENU, C. Osteogenesis imperfecta, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: TYPES OF HETEROGENEITY are\nA. Allelic Heterogeneity,\nB. Phenotypic Heterogeneity,\nC. Locus or Nonallelic Heterogeneity.\nNonallelic or locus heterogeneity refers to the situation in which a similar disease phenotype results from mutations at different genetic loci. E.g Osteogenesis imperfecta, Albinism, Muscular dystrophy syndromes (dystrophin, most common cause of mus dystrophy and has large gene size).', 'role': 'assistant'}]