This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood, Subject name: Pathology
[{'content': "RS cells are seen in? \nSelect and explain. \nA. Hodgkin's disease, B. Sickle cell anaemia, C. Thalasemia, D. CML", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Hodgkin's disease * Hodgkin's disease is characterized by presence of Reed-sternberg cells (Classical Reed-sternberg cells) and its variants. RS cells are derived from B-cells of germinal center and induce accumulation of reactive, lymphocytes, histiocytes (macrophages) and granulocytes.", 'role': 'assistant'}]