This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'The screening method of choice in area where the prevalence of leprosy is 1/1000 is - \nSelect and explain. \nA. Contact survey, B. Group survey, C. Mass survey, D. Any of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Contact survey is done in areas where prevalence of leprosy is generally low ie less than 1 case per 1000 population. Group survey when prevalence is 1 in 1000 Mass survey is done in hyperendemic area where prevalence is about 10 or more per 1000 population Reference; Park&;s Textbook of preventive and social medicine, 24th edition.Pg no. 339', 'role': 'assistant'}]