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
What is the modification of the Mapelson E breathing system used in infants? 
Select and explain. 
A. Mapleson A, B. Mapleson B, C. Mapleson C, D. Mapleson F
D: Mapleson F
Answer: D: Mapleson F 
Explanation: Jackson's Rees is best suited for pediatric ventilation.Modification of Ayer's T-piece /type E used in children <6years or 20kgs.