This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Brucellosis can be transmitted by all of the following modes, except - \nSelect and explain. \nA. Contact with infected placenta, B. Ingestion of raw vegatable from infected farms, C. Person to person transmission, D. Inhalation of infected dust or aerosol', 'role': 'user'}, {'content': 'Answer: C \nExplanation: <p> Person to person transmission not occur. Mode of transmission of brucellosis are contact infection,food borne infection,air borne infection. Reference:Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:290-291. <\\p>', 'role': 'assistant'}]