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': 'Which part of mind gives instinctual drives to a person to obtain immediate gratification according to structural model of mind? \nSelect and explain. \nA. Id, B. Ego, C. Super ego, D. Repressor', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Id works on "reality principle"\nId is about the innate, instinctual drives of a person that gives him immediate gratifaction such as hunger, anger & sex.', 'role': 'assistant'}]