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: Pathology
Most used selective medium for streptococcus rnutans is 
Select and explain. 
A. Mac conkey medium, B. Mitus salivarius bacitracin agar, C. Nutrient agar, D. Tellurite medium
B: Mitus salivarius bacitracin agar
Answer: B: Mitus salivarius bacitracin agar 
Explanation: None