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: Forensic Medicine
[{'content': 'Which of the following is an exotoxin: NIMHANS 07 \nSelect and explain. \nA. E. coli toxin, B. Proteus, C. Pseudomonas, D. Tetanus toxin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Tetanus toxin', 'role': 'assistant'}]