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: Pediatrics
[{'content': 'The following are the features of β thalassemia major except – \nSelect and explain. \nA. Bone marrow hyperplasia, B. Hair–on–end appearance, C. Splenomegaly, D. Increased osmotic fragility', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]