This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Organic Mental Disorder, Subject name: Psychiatry
[{'content': 'Which of the following present with loss of conciousness: \nSelect and explain. \nA. Schizophrenia, B. Dementia, C. Mania, D. Organic brain syndrome', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) Organic brain syndrome', 'role': 'assistant'}]