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
In nutrient agar conc. of agar is - 
Select and explain. 
A. 1%, B. 2%, C. 3%, D. 4%
B: 2%
Answer: B: 2% 
Explanation: Ans. is 'b' i.e., 2% Nutrient agar is made by adding 2% agar to nutrient broth.