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': 'All are true about leprosy except - \nSelect and explain. \nA. .+2 mean 2 bacilli in 2 smear, B. At least 7 smear examined, C. Paucibacillary bacterial index < 2, D. Multi bacillary bacterial index grater than or equal to 2', 'role': 'user'}, {'content': 'Answer: A \nExplanation: +2 means 1-10 bacilli, on average, in 10 oil immersion field. Reference; Park&;s Textbook of preventive and social medicine, 24th edition.Pg no. 337', 'role': 'assistant'}]