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: Surgery
[{'content': 'In an encephala isole preparation, the transections is done at: \nSelect and explain. \nA. First cervical spinal segment, B. Level of medulla, C. Midpontine level, D. Midcollicular level', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a. First cervical spinal segment', 'role': 'assistant'}]