This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lab Investigations, Subject name: Microbiology
Which of the following test is the best diagnosis in a patient with typhoid? 
Select and explain. 
A. Blood culture, B. Widal, C. Stool culture, D. Urine culture
A: Blood culture
Answer: A: Blood culture 
Explanation: Other than a positive blood culture, no specific laboratory test is diagnostic for enteric fever. Option 2- The possible presence of cross reactive antibodies limits the use of serological test in the diagnosis of Salmonella. Option 3, 4: Stool/Urine culture can be used for typhoid carriers.