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
Bains' circuit is Mapelson type – circuit – 
Select and explain. 
A. Tyep A, B. Type B, C. Type D, D. Type E
C: Type D
Answer: C: Type D 
Explanation: Type A  → Magill circuit
Type C  → Water's (to & fro) circuit
Type D  → Bain's circuit
Type E  → Ayre's T piece
Type F  →  Jackson - Rees circuit