<prompt> The right costo-phrenic line extends up to the level of which rib in the mid-axillary line -6th10th8th12th  <response>: The inferior margin of pleura extends onto diaphragm at the level of Costodiaphragmatic line- 8th rib in the midclavicular line- 10th rib in mid-axillary line- 12th rib at the lateral border of erector spinae.The lower border of lungs extends till the level of- 6th rib in the midclavicular line- 8th rib in mid-axillary line- 10th rib at the lateral border of erector spinae. 