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: Skin
The most appropriate test used to diagnose asymptomatic neurosyphilis: 
Select and explain. 
A. VDRL, B. TPHA, C. FTA-Abs, D. TPI
A: VDRL
Answer: A: VDRL 
Explanation: TPI The classical findings include: 10-100 WBC/cm3, protein 50-100mg/dl & positive VDRL/RPR. Ref: Sexually transmitted infections, Bhushan Kumar, 2nd edition pg 460.