<prompt> Injury occurs at C7 root, in what pa of arm, sensation will be lostUpper medialLower medialPosteriorNone of the above  <response>: BD CHAURASIA S HUMAN ANATOMY SIXTH edition Vol 1 Arm is not supplied by cranial nerves It is mainly supplied by ulnar and median nerve So an injury to root of C 7 is most unlikely to cause loss of sensation of arm 