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
Which of the following statements about C. diphtheria is false - 
Select and explain. 
A. Toxin production is mediated by native chromosome, B. Organism may be identified by tests for toxigenicity, C. Toxin acts by inhibiting protein synthesis, D. Toxin may affect the heart and nerves
A: Toxin production is mediated by native chromosome
Answer: A: Toxin production is mediated by native chromosome 
Explanation: None