This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics, Subject name: Medicine
[{'content': "All are autosomal recessive except: (Repeat) \nSelect and explain. \nA. Haemochromatosis, B. Sickle cell anaemia, C. Friederich ataxia, D. B. Huntington's chorea", 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans: D (Huntington's chorea) Ref: Harrison's Principles of Internal Medicine, 18th edition, page 3148Explanation: (See the following table)", 'role': 'assistant'}]