In mid clavicular plane, lower border of lung lies at level of:: (A) 4th rib, (B) 6th rib, (C) 8th rib, (D) 10th rib
Answer is B. The lower border of the lung in midinspiration follows a curving line, which crosses the 6th rib in the midclavicular line and the 8th rib in the midaxillary line, and reaches the 10th rib adjacent to the veebral column posteriorly.