This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mood Disorders, Subject name: Psychiatry
[{'content': 'Which of the following symptoms must be present for the diagnosis of depressive disorders? \nSelect and explain. \nA. Loss of interest or pleasure, B. Recurrent suicidal tendencies, C. Insomnia, D. Indecisiveness', 'role': 'user'}, {'content': 'Answer: A \nExplanation: According to DMS - IV and DSM - V, to diagnose depression at least one of the following two symptoms should be present (1) Depressed mood (2) Loss of interest or pleasure', 'role': 'assistant'}]