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: Microbiology
[{'content': 'Brucella abous primarily affects \nSelect and explain. \nA. Dog, B. Cattle, C. Swine, D. Goat', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Cattle Human brucellosis is a zoonosis, acquired from animals directly or indirectly. The animals that commonly act as sources Sheep, goat and camel Cattle or Buffalo Swine Dog Br melitensis Br. abous Br suis Br canis", 'role': 'assistant'}]