This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Special topics, Subject name: Anatomy
[{'content': 'An anxiety reaction in which the mind is preoccupied with ceain thoughts and ideas that cannot be driven away is \nSelect and explain. \nA. Impulse, B. Phobia, C. Obsession, D. Confabulation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Obsession This is an anxiety reaction in which the mind is preoccupied with ceain thoughts and ideas that cannot be driven away Ref: FORENSIC MEDICINE AND TOXICOLOGY Dr PC IGNATIUS THIRD EDITION PAGE 360', 'role': 'assistant'}]