This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'Transmission of agent by vectors is facilitate 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 feces, D. Regurgitation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Methods in which vectors transmit agents: Biting Regurgitation Scratching in of infective faeces Contamination of host with body fluids of vectors (refer pgno:98 park 23 rd edition)', 'role': 'assistant'}]