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
True regarding Leprosy 
Select and explain. 
A. Any positive smear 1+ is MBL, B. MBL recommended treatment for 12 months duration, C. Grenz zone in Lepromatous spectrum, D. All deformity cases are MBL
B: MBL recommended treatment for 12 months duration
Answer: B: MBL recommended treatment for 12 months duration 
Explanation: None