Anatomy Which of the following represents the surface marking of the aoic valve: A Sternal end of the left 3rd costal cailage B Sternal end of the right 3rd costal cailage C Behind the sternum in left 3rd intercostal space D Behind the sternum in right 3rd intercostal space 💡 Explanation Which of the following represents the surface marking of the aoic valve: ✓ Correct Answer: C. Behind the sternum in left 3rd intercostal space