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 one of the following is true - 
Select and explain. 
A. Agar has nutrient properties, B. Chocolate medium is selective medium, C. Addition of selective substances in a solid medium is called enrichment media, D. Nutrient broth is basal medium
D: Nutrient broth is basal medium
Answer: D: Nutrient broth is basal medium 
Explanation: None