This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
[{'content': 'Isolated deletion of which chromosome causes Myelodysplastic syndrome ? \nSelect and explain. \nA. 2q, B. 5q, C. 8q, D. 11q', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Both primary and t- MDS are associated with recurrent chromosomal abnormalities including monosomies 5 and 7, deletions of 5q, 7q, and 20q and trisomy 8. Ref : Robbins and Cotran Pathologic basis of disease.South Asia Edition volume 1.page no. 614,615', 'role': 'assistant'}]