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': 'Isolated deletion of which chromosome cause myelodysplastic syndrome \nSelect and explain. \nA. 2q, B. 5q, C. 8q, D. llq', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., 5q", 'role': 'assistant'}]