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
[{'content': 'All of the following are used as proxy measures for incubation period, except: \nSelect and explain. \nA. Latent period, B. Period of communicability, C. Serial interval, D. Generation time', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Period of communicability', 'role': 'assistant'}]