This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'Best method of preventing transmission of MRSA infection is \nSelect and explain. \nA. Hand wash, B. Antibiotics, C. Disinfecting surfaces, D. Fumigation of the ward', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Measures for the control of staphylococcal infections in hospitals:*Isolation of patients with open staphylococcal lesion*Detection of staphylococcal lesions among doctors and health care workers*Hand washing is the oldest, simplest and most effective method of preventing MRSA and other cross infections.*Following strict aseptic precautions (Ref: Ananthanarayan 9th edition, p204)', 'role': 'assistant'}]