Regarding the chest wall:

• A. the intercostal artery runs between the external and internal intercostal muscles
• B. the muscles of outer thoracic wall layer are serratus posterior superior, serratus posterior inferior only
• C. the 5th posterior intercostal vein, artery and nerve run on the lower border of the 5th rib
• D. the order of structures in the intercostal space are artery, vein, nerve
• E. the 1st intercostal nerve supplies skin over the anterior chest wall