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
Incubation period depends on all except 
Select and explain. 
A. Individual susceptibility, B. Infective dose, C. Portal of entry, D. Size of the infective organism
D: Size of the infective organism
Answer: D: Size of the infective organism 
Explanation: None