This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other Key Definitions & Concepts, Subject name: Social & Preventive Medicine
[{'content': 'Interval between Primary case and Secondary case known as:- \nSelect and explain. \nA. Incubation period, B. Serial interval, C. Generation time, D. Case detection time', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Serial Interval - Interval between primary case and secondary case. Incubation Period- Entry of organism till first sign / Symptom. Generation time - Interval between entry of organism till maximum infectivity of that person or case.', 'role': 'assistant'}]