This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
[{'content': 'The screening for HCC in chronic liver disease \nSelect and explain. \nA. Serial USG + AFP, B. Serial LFT+AFP, C. Serial LFT+CT scan, D. Serial USG + serial LFT', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Screening is based on regular ultra sound scanning in high risk population and measurement of AFP levels Ref:Sabiston 20th edition Pgno : 1458-1463', 'role': 'assistant'}]