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': 'Presence of infectious arthropod agent on clothes or dressing is termed \nSelect and explain. \nA. Contamination, B. Infestation, C. Infection, D. Contagion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Infection: Entry of organism and its multiplication and/or development in host\nInfestation: Lodgement, development and reproduction of arthropods on surface of body or clothes\nContamination: Presence of infectious organism on body or in clothings/beds/ toys/surgical instruments/dressings/ in-animate objects\nContagion: Transmission of disease from one person to another by direct or indirect contact', 'role': 'assistant'}]