This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Agglutination test is ? \nSelect and explain. \nA. ABO incompatibility, B. VDRL, C. Weil- felix test, D. FTA-ABS', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Weil- Felix", 'role': 'assistant'}]