This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
[{'content': 'Which type of pulmonary TB is most likely to give sputum positive - \nSelect and explain. \nA. Fibronodular, B. Pleural effusion, C. Cavitary, D. None', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. is \'c\' i.e., Cavitary "Sputum smears are usually positive in patients with laryngeal TB, endobronchial TB and cavitary pulmonary- TB"-- Kelley\'s"Patients with cavitary pulmonary TB have high bacterial load in their sputum " --Internet', 'role': 'assistant'}]