<prompt>  From the scheme given below, choose the appropriateorder of priorities in the management of a patient with polytrauma:1.Control of external haemorrhage2.Intravenous infusion and transfusion3.Maintenance of patent airway4.Relief of a tension pneumothorax.5.Splinting of fractures.1,5,2,3,43,4,1,2,54,1,5,3,22,1,5,3,4 