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
If after 2 months of conventional antituberculous therapy, sputum smear examination is negative but culture is positive, it indicates - 
Select and explain. 
A. Treatment failure, B. Transitional resistance, C. Resistant tuberculosis, D. category-II failure
B: Transitional resistance
Answer: B: Transitional resistance 
Explanation: None