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': 'Sputum positive TB is? \nSelect and explain. \nA. 1 out of 2 sputum sample +ve, B. 2 out of 3 sputum sample +ve, C. BACTEC +ve, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: One positive specimen out of the two sputum specimens is enough to declare a patient as smear positive TB Reference; Park&;s Textbook of preventive and social medicine, 24th edition.Pg no. 193', 'role': 'assistant'}]