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
Oakley fulthrope procedure is 
Select and explain. 
A. Agglutination test, B. Precipitation test, C. Flocculation test, D. None of the above
B: Precipitation test
Answer: B: Precipitation test 
Explanation: 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