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
[{'content': 'True about endotoxin ? \nSelect and explain. \nA. Protein, B. Highly antigenic, C. No enzymatic activity, D. Produced by gram positive bacteria', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., No enzymatic activity", 'role': 'assistant'}]