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: Orthopaedics
[{'content': 'Which of the following conditions is least likely to present as an eccentric osteolytic lesion - \nSelect and explain. \nA. Aneurysmal bone cyst, B. Giant cell tumor, C. Fibrous cortical defect, D. Simple bone cyst', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]