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': 'Transmission of agent by vectors is facilitated by the following ways except one - \nSelect and explain. \nA. Contamination with body fluids of vectors, B. Scratching-in of infected feces, C. Ingestion of infected material, D. Regurgitation', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Ingestion of infected material o Methods in which vectors transmit agent are: a) Biting b) Regurgitation c) Scratching in of infective feaces. d) Contamination of host with body fluids of vectors", 'role': 'assistant'}]