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': 'All are true regarding staphylococcal toxin, except: \nSelect and explain. \nA. Beta hemolysin shows hot cold phenomenon, B. Mainly endotoxin, C. Enterotoxin causes food poisoning, D. Exfoliative toxin causes Ritter’s syndrome', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Gram positive bacteria will mainly act by producing exotoxins.', 'role': 'assistant'}]