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: Biochemistry
[{'content': 'Karyotyping under light microscopy is \nSelect and explain. \nA. L Banding, B. G banding, C. C Banding, D. FUdR banding', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. G banding [Ref: Nagesh Rao: Human genetics', 'role': 'assistant'}]