This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Social & Preventive Medicine
[{'content': 'Cyclo propagative means: \nSelect and explain. \nA. Only development, B. Only multiplication, C. No development and no multiplication, D. M ul ti plication and development', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ref: Park 'Textbook of Preventive and Social Medicine', 22nd edition.Explanation:Biological transmission PropagativeOnly multiplication, eg - plague bacilli in flea, dengue virus in mosquitoCyclo developmentalOnly development eg- filariai parasite in mosquitoCylco propagativeMultiplication and development eg. malarial parasite in mosquito* Cylco - development cycle* Propagative - multiplication", 'role': 'assistant'}]