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: Pathology
[{'content': 'Angelman syndrome is due to? \nSelect and explain. \nA. Mitochondrial inheritance, B. Chimerism, C. Mosaicism, D. Uniparental disomy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Angelman syndrome and prader willi syndrome are example of unipareantal disomy.', 'role': 'assistant'}]