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
Phage conversion is required for: 
Select and explain. 
A. Tularemia, B. Diphtheria, C. Gonorrhoea, D. All of the above
B: Diphtheria
Answer: B: Diphtheria 
Explanation: None