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
Prozone phenomenon is a feature is- 
Select and explain. 
A. Tularemia, B. Legionnaires' disease, C. Plague, D. Brucellosis
D: Brucellosis
Answer: D: Brucellosis 
Explanation: None