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': 'Malaria is transmitted by –  a) Anopheles stephensi  b) Anopheles culicifacies  c) Culex  d) Phlebotomus \nSelect and explain. \nA. ab, B. ac, C. bd, D. cd', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]