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': 'Saddle block is used for – \nSelect and explain. \nA. Surgery of lower limbs, B. Upper abdominal surgery, C. Inguinal hernia repair, D. Perianal surgery', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Saddle block is the spinal anesthesia given in sitting position and the patient remains seated for 5 minutes. It is used for perianal surgeries.', 'role': 'assistant'}]