This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Social & Preventive Medicine
[{'content': 'Healthworker-hand washing \nSelect and explain. \nA. Cleaning hands with spirit before and after examination of each patient, B. Visible blood stain on hand is washed with soap and water, C. Use of soap an Dettol only for hand washing before surgery, D. Hand rub cannot be used in place of hand washing', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (A) Cleaning hands with spirit before and after examiation of each patient > Introduction of easily accessible dispensers with an alcohol-based waterless handwashing antiseptic led to significantly higher handwashing rates among health care workers.', 'role': 'assistant'}]