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': 'The anopheles species most commonly found in urban areas is: \nSelect and explain. \nA. Anopheles philippinensis, B. Anopheles stephensi, C. Anopheles flutilifs, D. Anopheles minimus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Anopheles stephensi', 'role': 'assistant'}]