Comparing the Synergistic Effect of Caudal Dexmedetomidine and Propofol Versus Caudal Dexmedetomidine Only or Propofol Only in Prevention of Sevoflurane Related Emergence Agitation in Pediatric Patients Undergoing Congenital Inguinal Hernia Repair

Inclusion Criteria: * Age 2-7 years * Both genders * American society of anesthesiologists (ASA) physical state I-II * Children undergoing sub-umbilical abdominal surgeries Exclusion Criteria: * Guardians refusal * Congenital anomalies at the lower spine or meninges * Increased intracranial pressure * Skin infection at the site of injection * Bleeding diathesis * Known allergy to any drugs used in this study * Children with behavioral changes; physical or developmental delay; neurological disorder or psychological disorder. * Children on sedative or anticonvulsant medication.