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: Anaesthesia
[{'content': 'In high spinal anaesthesia what is seen – \nSelect and explain. \nA. Hypotension & Bradycardia, B. Hypotension & Tachycardia, C. Hypertension & Bradycardia, D. Hypertension & Tachycardia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Spinal anesthesia ascending into the cervical levels (high spinal anesthesia) causes severe hypotension, bradycardia and respiratory insufficiency.', 'role': 'assistant'}]