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
Size of the laryngeal mask airway for normal adults- 
Select and explain. 
A. 2.5, B. 3, C. 1.5, D. 4
D: 4
Answer: D: 4 
Explanation: LMA size 1 1.5 2 2.5 3 4 5 Patient size Upto 5 kg 5-9kg 10-19kg 20-29kg 30-49kg 50-69kg 70-100kg