This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
The time interval between diagnosis by early detection and diagnosis by other means(2004) 
Select and explain. 
A. Incubation period, B. Lead time, C. Serial interval, D. Latent period
B: Lead time
Answer: B: Lead time 
Explanation: Ans: bRef: Park, 17th ed, p. 109 & 18th ed, p. 113, 114