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
Which of the following is an enrichment medium 
Select and explain. 
A. Blood agar, B. Selenite F Broth, C. Mac Conkey agar, D. Nutrient Broth
B: Selenite F Broth
Answer: B: Selenite F Broth 
Explanation: None