This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Types of Genetic Disorders, Subject name: Pediatrics
[{'content': 'Which of the following procedures is routine technique for karyotyping using light microscopy: \nSelect and explain. \nA. C-banding, B. G-banding, C. Q-banding, D. V-staining', 'role': 'user'}, {'content': 'Answer: B \nExplanation: G-banding which includes staining with Giemsa is the most common technique used for karyotyping Q-banding- fluorescent pattern obtained using quinacrine for staining C-banding- selective chromosome stain in which Giemsa stain is used to stain heterochromatic regions close to the centromeres V-staining- method for detecting apoptotic cells.', 'role': 'assistant'}]