This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Screening, Subject name: Social & Preventive Medicine
[{'content': 'The time interval between diagnosis by early detection and diagnosis by other means is - \nSelect and explain. \nA. Incubation period, B. Lead time, C. Serial interval, D. Latent period', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .lead time is the advantage gained by screening.that is the period between diagnosis by early detection and diagnosis by other means.the benefits are alwaysd evaluated in terms of outcomes. ref:park&;s textbook ,22 nd edition,pg no 128', 'role': 'assistant'}]