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 for: \nSelect and explain. \nA. Chromosomal disorders, B. Autosomal recessive disorders, C. Autosomal dominant disorders, D. Linkage disorders', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Karyotyping Study of chromosomes. Chromosomes are arrested in metaphase by Colchicine Most commonly used stain is Giemsa stain, so called G-band. Chromosomes are arranged in order of decreasing length Any alteration in number or structure of chromosomes can be easily detected by karyotyping.', 'role': 'assistant'}]