This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Haemophilus, Yersinia, Spirochaetes, Ricketssia, Chlamydia, Mycoplasma and Miscellaneous Bacteria), Subject name: Microbiology
[{'content': 'VDRL is an example of - \nSelect and explain. \nA. Slide agglutination, B. Tube agglutination, C. Slide flocculation, D. Tube flocculation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The Veneral Disease Research Laboratory test (VDRL) is a non-specific test for syphilis and it is a slide flocculation (precipitation) test.', 'role': 'assistant'}]