This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anaesthetic equipments, Subject name: Anaesthesia
[{'content': 'Size of LMA used for 25kg child is \nSelect and explain. \nA. 1, B. 1.5, C. 2.5, D. 4', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Size of LMA used for a 25 kg child is 2.5 LMA size 6 is used in adults weighing over 100 kg', 'role': 'assistant'}]