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: Anaesthesia
[{'content': 'Laryngeal mask airway size 2 is recommended for – \nSelect and explain. \nA. < 6.5 kg, B. 6.5–20 kg, C. 20–30 kg, D. 30–50 kg', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Size 2 LMA is used for infants & children weighing 10 - 20 kg.', 'role': 'assistant'}]