Intercostobrachial nerve is a branch of -: (A) 1st intercostal nerve, (B) 2nd intercostal nerve, (C) 3rd intercostal nerve, (D) Upper trunk of brachial plexus
Answer is B. Intercostobrachial nerve
-        Lateral cutaneous branch of 2nd intercostal nerve
-        Supplies

Skin of floor of axilla.
Upper part of medial aspect of arm.