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': 'A child undergone bilateral adrenalectom, later he developed headache, visual field defect, Hyper pigmentation of skin,what is the most probable diagnosis? \nSelect and explain. \nA. Pitutary adenoma, B. Allgrove syndrome, C. Wolman  syndrome, D. Nelson  syndrome', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Nelsom syndrome :\xa0\nIt is complication after bilateral adrenalectomy due to rapid enlargement of pre - existing ACTH producing adenoma with above clinical features.', 'role': 'assistant'}]