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
Concentrated alcohol-based antiseptic for skin preparation of the operative site leads to 
Select and explain. 
A. >95% reduction in bacterial count, B. >50% reduction in bacterial count, C. <50% reduction in bacterial count, D. Contraindicated for operative site
A: >95% reduction in bacterial count
Answer: A: >95% reduction in bacterial count 
Explanation: 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