This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Anatomy
All are typical intercostal nerves except 
Select and explain. 
A. 2nd, B. 3rd, C. 4th, D. 5th
A: 2nd
Answer: A: 2nd 
Explanation: Upper two intercostal nerves also supply the upper limb,third to sixth supply only the thoracic wall.so they are called typical intetcostal nerves. . B D CHAURASIA&;S HUMAN ANATOMY UPPER LIMB THORAX-VOLUME-1 SIXTH EDITION Page no:217