<prompt> which of the following is true regarding ERBS PALSY ?Can be a bih injuryC5 C6 root involvedDeformity is adduction and internal rotationUlnar nerve is affected  <response>: Can be. A bih injury C5C6 root involved Deformity is abduction and internal rotation of arm Complete paralysis of biceps and Brachioradialis muscle Refer : maheswari 9th ed 