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
[{'content': 'What is the type of Ag-Ab reaction seen in VDRL \nSelect and explain. \nA. Agglutination, B. Flocculation, C. Passive agglutination, D. Gel precipitation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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', 'role': 'assistant'}]