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': 'True about Bain circuit – a) Mapleson type Bb) Mapleson type Dc) Can be used for spontaneous respirationd) Can be used for controlled vantilatione) Coaxial \nSelect and explain. \nA. bce, B. abd, C. bcde, D. acde', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Bain circuit (type D Mapleson) is a co-axial system.\nIt is the circuit of choice for controlled ventilation.\nIt can also be used for spontaneous ventilation.', 'role': 'assistant'}]