This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
[{'content': 'Schizophrenia mostly occurs in - \nSelect and explain. \nA. Adolescents, B. Children, C. Middle age, D. Old age', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Schizophrenia starts in late adolescence and early adulthood (15-20 years).', 'role': 'assistant'}]