This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics, Subject name: Pathology
[{'content': 'Karyotyping is done with all, except: \nSelect and explain. \nA. Blood lymphocyte, B. Blood monocyte, C. Amnion, D. Fibroblast', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Blood monocyte(Ref: R 9th/pg 158; 8th/pg 159)To produce a karyotype, cells capable of growth and division is used, as karyotyping is done by arresting mitosis in dividing cells in metaphase.None of the leukocytes in blood normally divide, but lymphocytes can readily be induced to proliferate, providing a very accessible source of metaphase cells; but monocytes cannot be used.', 'role': 'assistant'}]