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: Medicine
[{'content': "Anti CD120 antibody is now the treatment of choice for - \nSelect and explain. \nA. All low grade non-hodgkin's lymphomas, B. Relapsed B cell follicular lymphomas, C. Relapsed Hodgkin's disease, D. Chronic lymphatic leukaemia", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]