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
Widal Test is: 
Select and explain. 
A. Flocculation test, B. Agglutination test, C. Both, D. None
B: Agglutination test
Answer: B: Agglutination test 
Explanation: Agglutination test