Position with least vital capacity in G.A.: (A) Trendelenburg, (B) Lithotomy, (C) Prone, (D) Lateral
Answer is A. A i.e. Trendelenburg In trendelenburg position, head end is lowered so due to gravity and weight of intra-abdominal viscera, diaphragm is at its highest level causing compression of lungs; so vital capacity is lowered.