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: Forensic Medicine
[{'content': 'Karyotyping of the foetus may be done from all of the following except - \nSelect and explain. \nA. Lymphocyte, B. Monocyte, C. Amniocyte, D. Fibroblast', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Although human chromosome may be visualized (karyotyping) in any growing tissue such as bone marrow, skin, fibroblast, amniotic fluid cells or chorionic villus; they are most conveniently studied in peripheral blood lymphocytes.', 'role': 'assistant'}]