This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology Pa 1 (Gram Positive Cocci, Gram Negative Cocci), Subject name: Microbiology
[{'content': 'Streptococcus all are true except \nSelect and explain. \nA. Streptodornase cleaves DNA, B. Streptolysis O is active in reduced state, C. Streptokinase is produced from serotype A, C, K, D. Pyrogenic toxin A is plasmid mediated', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Three toxin types of streptococcal pyroexotoxin have been identified: A, B and C. Type A and C are bacteriophage coded Type B is chromosomally mediated', 'role': 'assistant'}]