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
Which of the following is the most specific test to diagnose syphilis - 
Select and explain. 
A. VDRL Test, B. Wassermann Test, C. RPR Test, D. FTA-ABS
D: FTA-ABS
Answer: D: FTA-ABS 
Explanation: Ans. is 'd' i.e., FTA-ABS