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: Surgery
[{'content': 'ORF stands for \nSelect and explain. \nA. Open reading frame, B. Oncocytic removing fraction, C. Oncogenic removing frequency, D. Oil fraction in blood', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]