<prompt> Neck of 1st rib is related anteriorly to all except:Ascending T1 rootSuperior intercostal arterySympathetic chain2nd posterior intercostals vein  <response>: Ans: d 2th posterior intercostal veinRef: Chaurasia, 3rd edi., Vol-1, Pg. 168Anteriorly neck is related from medial to lateral to1. Sympathetic chain2. First posterior intercostal vein3. Superior Intercostal artery4. First thoracic nerve.T1 Superior aspect of the shaft is related to subclavian vein and posterior groove lodges the subclavian artery and the lower trunk of the brachial plexus. 