This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'Poers of Infection" are - \nSelect and explain. \nA. Anopheles, B. Housefly, C. Aedes, D. Cockroaches', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., Housefly o Houseflies are exceptionally efficeint mechanical spreaders of disease. They transpo microorganisms on their feet and hairly legs. Pathogenic organisms, ova and cysts have been recovered from the bodies of the common housefly. Housefies arc therefore called "poer of infection".', 'role': 'assistant'}]