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
Robe Koch assistant advised him to use agar instead of gelatine culture media for cultivation of bacteria as: 
Select and explain. 
A. Agar has more nutrition, B. Gelatin melts at 27degC, C. Gelatin is not easily available, D. Agar is cheaper
B: Gelatin melts at 27degC
Answer: B: Gelatin melts at 27degC 
Explanation: Ans. (b) Gelatin melts at 27degC