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
Pathogenesis of diphtheria is attributed to 
Select and explain. 
A. Invasion, B. Endotoxin, C. Exotoxin, D. Capsule
C: Exotoxin
Answer: C: Exotoxin 
Explanation: None