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': 'Childhood malignancy producing proptosis is/are : \nSelect and explain. \nA. Neuroblastoma, B. Retinoblastoma, C. Nephroblastoma, D. All of these', 'role': 'user'}, {'content': "Answer: D \nExplanation: Childhood tumors producing proptosis are :\na) Retinoblastoma.\nb) Rhabdomyosarcoma.\nc) Lymphoma & lymphosarcoma.\nd) Secondaries from neuroblastoma, nephroblastoma, Ewing's sarcoma, & leukaemic infiltration.", 'role': 'assistant'}]