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': "Bains' circuit is Mapelson type – circuit – \nSelect and explain. \nA. Tyep A, B. Type B, C. Type D, D. Type E", 'role': 'user'}, {'content': "Answer: C \nExplanation: Type A \xa0→\xa0Magill circuit\nType C \xa0→\xa0Water's (to & fro) circuit\nType D \xa0→\xa0Bain's circuit\nType E \xa0→\xa0Ayre's T piece\nType F \xa0→ \xa0Jackson - Rees circuit", 'role': 'assistant'}]