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
True about endotoxin ? 
Select and explain. 
A. Protein, B. Highly antigenic, C. No enzymatic activity, D. Produced by gram positive bacteria
C: No enzymatic activity
Answer: C: No enzymatic activity 
Explanation: Ans. is 'c' i.e., No enzymatic activity