Apex of lungs at what level of cervical veebra?

The apex (apex pulmonis) is rounded, and extends into the root of the neck, reaching from 2.5 to 4 cm. above the level of the sternal end of the first rib. A sulcus produced by the subclan aery as it curves in front of the pleura runs upward and lateralward immediately below the apex. Ref: Anatomy of the Human Body Henry Gray.