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: Medicine
[{'content': 'A man presents with fever, wt loss and cough. Mantoux reads an induration of 17 x 19 mm, Sputum cytology is negative for AFB. Most likely diagnosis is \nSelect and explain. \nA. Pulmonary tuberculosis, B. Fungal infection, C. Viral infection, D. Pneumonia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]