<prompt> Which of the following isare clinical features of tetanus?DysphagiaRisus sardonicusOpisthotonusAll of the above  <response>: The clinical features of tetanus are: Trismus combined with pain and stiffness of neck, abdomen and back.Dysphagia.Anxious expression risus sardonicus.The muscles of neck and trunk become rigid and the back is slightly arched opisthotonus.Respiratory failure. 