This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
[{'content': 'Methicillin-resistant Staphylococcus aureus is \nSelect and explain. \nA. Resistant to iodine solution, B. Transmitted the air-conditioning system, C. Causes deeper infections, D. Pulse field gel electrophoresis is useful in the investigation of an outbreak', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Methicillin-resistant Staphylococcus aureus (MRSA) infections outside the healthcare setting are an increasing concern. MRSA isolates are analyzed by pulsed-field gel electrophoresis (PFGE). MRSA infection was significantly associated with a low composite hygiene score. PFGE analysis showed that isolates were indistinguishable and associated with community-onset MRSA infections in other US prisons. Improving hygiene practices and environmental conditions may help prevent and interrupt future MRSA outbreaks in prison settings. Ref: Textbook of Microbiology; Ananthanarayanan and Panicker; 10th Edition; Pg:205', 'role': 'assistant'}]