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 essential medium ? 
Select and explain. 
A. MacConkey agar, B. Nutrient agar, C. Deoxycholate citrate agar, D. Selenite F broth
B: Nutrient agar
Answer: B: Nutrient agar 
Explanation: Ans. is 'b' i.e., Nutreint agar A minimum essential medium is a culture medium whereupon most bacteria can grow. Examples is Nutrient agar.