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': 'The sputum examination under DTP is done when the patient present with - \nSelect and explain. \nA. Cough of 1-2 weeks duration, B. Persistent cough of 1-2 weeks duration, C. Hemoptysis, D. Chest pain', 'role': 'user'}, {'content': 'Answer: C \nExplanation: <p> Hemoptysis Sputum examination under TB programme is done when patient presents with -cough more than 2 weeks. -fever with an evening rise. -hemoptysis. -unexplained weight loss. -reduced appetite. Park&;s textbook of preventive and social medicine,K.Park,21st edition,page no:392, 22nd edition,page no:396. <\\p>', 'role': 'assistant'}]