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': 'Which of the following is a flocculation test - \nSelect and explain. \nA. Widal test, B. Weil - felix test, C. VDRL, D. Paul - Bunnel test', 'role': 'user'}, {'content': "Answer: C \nExplanation: The VDRL test fur syphilis is an example of slide flocculation. When a drop each of the antigen and the antiserum are placed on a slide and mixed by shaking, floccules appear. Reference:Anathanarayan & paniker's 9th edition, pg no: 106 <\\p>", 'role': 'assistant'}]