<prompt> Policemans tip hand is seen inErbs palsyKlumpkes paralysisAxillary nerve injuryNone of the above  <response>: ERBS PARALYSIS:-upper plexus injury.Caused by forceful widening of the angle between the head and shoulder which may occur by traction of arm during the birth of a child or by fall on the shoulder.Involves upper trunk - C5, C6 roots.Leads to typical deformity in the limb- policemans tip hand porters tip hand. The arm hangs by the side, adducted and medially rotated, forearm is extended and pronated.1. Adduction of arm due to deltoid paralysis.2. Medial rotation of arm-paralysis of supraspinatus, infraspinatus and teres minor.3. Extension of elbow- paralysis of biceps brachii4. Pronation of forearm- paralysis of biceps brachi5. Loss of sensation over outer aspect of arm due to C6 spinal nerve involvement. 