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
Reactive tubercular ahritis: 
Select and explain. 
A. Spina ventusa, B. Pott's disease, C. Poncet's disease, D. None
C: Poncet's disease
Answer: C: Poncet's disease 
Explanation: Ans. is. 'c' i. e. Poncet's disease