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
Toxin production by corynebacterium diphtheriae is due to ? 
Select and explain. 
A. Chromosomal mutation, B. Presence of plasmid, C. Lysogenic conversion, D. Transformation
C: Lysogenic conversion
Answer: C: Lysogenic conversion 
Explanation: None