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': 'All of the following are associated with Secondary Hemochromatosis except - \nSelect and explain. \nA. Thalassemia Major, B. Sideroblastic Anemia, C. Hereditary Spherocytosis, D. Paroxysmal Nocturnal Haemoglobinuria (PNH)', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]