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: Forensic Medicine
[{'content': 'Concussion causes: Karnataka 07 \nSelect and explain. \nA. Small hemorrhages and swelling of brain tissues, B. Momentary interruption of brain function with/ without loss of consciousness, C. Tearing or shearing of brain structures, D. Bruising of the brain', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Momentary interruption of brain function with/ without loss of consciousness', 'role': 'assistant'}]