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: Social & Preventive Medicine
The most infectious variety of diptheria is - 
Select and explain. 
A. Anterior nasal diptheria, B. Posterior nasal diptheria, C. Faucial diptheria, D. Laryngeal diptheria
A: Anterior nasal diptheria
Answer: A: Anterior nasal diptheria 
Explanation: None