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
One of the following is an agglutination test in the diagnosis of typhoid: 
Select and explain. 
A. Wide test, B. Eleks test, C. Mantoux test, D. Wasserman test
A: Wide test
Answer: A: Wide test 
Explanation: None