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': 'That part of the mind which is working on reality principle is - \nSelect and explain. \nA. ID, B. Ego, C. Super ego, D. Ego-ideal', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The id\xa0\xa0→\xa0Pleasure principle\nThe Ego\xa0\xa0→\xa0Reality principle\nThe superego →\xa0Idealism principle', 'role': 'assistant'}]