<prompt> Which is not a true rib:5th6th7th8th  <response>: Ans. D 8thRef: BDC, 6th ed. Vol 1 pg. 196-97 True ribs: Ribs directly articulating with sternum through costal cartilage. They are ribs 1 to 7 False ribs: Ribs that do NOT articulate directly with sternum. Ribs 8 to 12th. 