This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'Oakley fulthrope procedure is \nSelect and explain. \nA. Agglutination test, B. Precipitation test, C. Flocculation test, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Antibody (antiserum) is incorporated in agar, poured into a tube and allowed to harden. A second layer of agar without antibody is placed above and allowed to solidify. Antigen solution is placed above the agar. The precipitin band appears in the plain agar column. Ref ananthnarayana and panikers microbiology textbook 8/e', 'role': 'assistant'}]