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
What is the type of Ag-Ab reaction seen in VDRL 
Select and explain. 
A. Agglutination, B. Flocculation, C. Passive agglutination, D. Gel precipitation
B: Flocculation
Answer: B: Flocculation 
Explanation: Instead of sedimenting,the precipitate remains suspended as floccules which is called flocculation,which is a type of precipitation reactions,one amongst whose applications is the VDRL test for syphilis. Ref: anantnarayan and panikers 10 th edition