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': 'Which one of the following is/are used as operational indicators in antileprosy activity - \nSelect and explain. \nA. Incidence, B. Incidence and prevalence, C. Relapse rate and case detection ratio, D. Incidence case detection ratio', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]