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
Streptococcus all are true except 
Select and explain. 
A. 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
D: Pyrogenic toxin A is plasmid mediated
Answer: D: Pyrogenic toxin A is plasmid mediated 
Explanation: 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