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: Ophthalmology
[{'content': 'Most common site of bony metastases in retinoblastoma \nSelect and explain. \nA. Skull bones, B. Hip bones, C. Ribs, D. Veebrae', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer-A. Skull bonesThe most frequently identified sites of metaststic involvement in children with retinoblastoma include skull bones, distal bones, brain, spinal cord, lymph nodes and abdominal viscera.', 'role': 'assistant'}]