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': 'Suicidal tendencies are seen in: \nSelect and explain. \nA. Substance abuse, B. Post-traumatic stress disorder (PTSD), C. Schizophrenia, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Depression, substance use disorders, schizophrenia, PTSD are all associated with increased suicide risk', 'role': 'assistant'}]