Bains' circuit is Mapelson type – circuit –: (A) Tyep A, (B) Type B, (C) Type D, (D) Type E
Answer is C. 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