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': "Deletion of chromosome 11 leads to - \nSelect and explain. \nA. Wilm's, B. Neuroblastoma, C. Retinoblastoma, D. Osteosarcoma", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Wilms's tumor", 'role': 'assistant'}]