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
Malaria is transmitted by –  a) Anopheles stephensi  b) Anopheles culicifacies  c) Culex  d) Phlebotomus 
Select and explain. 
A. ab, B. ac, C. bd, D. cd
A: ab
Answer: A: ab 
Explanation: None