This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
VDRL test for diagnosis of syphilis is an example for 
Select and explain. 
A. Precipitation test, B. Agglutination, C. Immunofluorescence, D. Flocculation
D: Flocculation
Answer: D: Flocculation 
Explanation: VDRL- Flocculation test Though flocculation also is a type of precipitation, flocculation is ideal for VDRL In which floccules are suspended after formation of antigen-antibody complex Ref: Textbook of Microbiology Baveja 5th ed Pg 120