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: Dental
Incubation period of Lymphogranuloma venerum is: 
Select and explain. 
A. 1-5 days, B. 5-7 days, C. 60-90 days, D. 10-30 days
D: 10-30 days
Answer: D: 10-30 days 
Explanation: None