This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
[{'content': 'Concentrated alcohol-based antiseptic for skin preparation of the operative site leads to \nSelect and explain. \nA. >95% reduction in bacterial count, B. >50% reduction in bacterial count, C. <50% reduction in bacterial count, D. Contraindicated for operative site', 'role': 'user'}, {'content': 'Answer: A \nExplanation: One application of a more concentrated alcohol-based antiseptic is adequate for skin preparation of the operative site.This leads to a >95% reduction in bacterial countCaution should be taken not to leave a pool of alcohol-based fluid on the skin which could ignite with diathermy and burn the patient.Ref: Bailey and Love 27e pg: 52', 'role': 'assistant'}]