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': 'Most common injection site infection in spinal anaesthesia \nSelect and explain. \nA. Staphylococcus, B. Streptococcus, C. Pseudomonas, D. Bacteroides', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Streptococcal infection is most common in spinal anaesthesia.', 'role': 'assistant'}]