A 24-year-old man presents to the emergency department with severe depression, hopelessness and a clear plan to hang himself. He says he has written a suicide note. What is the most appropriate immediate management?AArrange routine outpatient psychology referralBStart an antidepressant and send him home with close GP follow-upCEnsure he is not left alone, initiate constant observation and arrange urgent psychiatric assessment and possible admissionDAdvise him to call Lifeline if things worsenEGive him benzodiazepines for sleep and dischargeCheck my answer