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. Hypeension & Bradycardia, D. Hypeension & Tachycardia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Hypotension & Bradycardia Spinal anesthesia ascending into cervical levels causing severe hypotensionQ, bradycardiaQ, respiratory insufficiencyQ & unconsciousnessQ is known as high or total spinal anesthesia. It can also occur following attempted epidural/caudal anethesia, if there is inadveent intrathecal injection of large amount of anesthetic intended for epidural space.', 'role': 'assistant'}]