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
The most commonly performed test for serodiagnosis of syphilis is - 
Select and explain. 
A. TPHA, B. Waserman, C. TPT, D. VDRL
D: VDRL
Answer: D: VDRL 
Explanation: Ans. is 'd' i.e., VDRL