This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concept of health and disease, Subject name: Social & Preventive Medicine
[{'content': 'All the following are fishes used in biological control of vectors except \nSelect and explain. \nA. Gambusia, B. Poccilla, C. Aplochelius, D. Coelomomyces', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Example of larvivorous fish (those that feed on immature stages of mosquitoes) are Gambusia, Poecilia, Aplochelius Ref : Park 23rd edition Pgno : 773', 'role': 'assistant'}]