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: Microbiology
[{'content': 'What is true about Histoplasmosis - \nSelect and explain. \nA. In early stage it is indistinguishable from TB, B. Culture is not diagnostic, C. Mycelial forms are infectious form, D. Person to person spread occurs by droplet infection', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Chronic cavitary histoplasmosis is seen in smokers who have structural lung disease (e.g. bullous emphysema) is\xa0characterized upper-lobe infiltrates, cavitation, and pleural thickening- mimics cavitary tuberculosis.\nIsolation of fungi by culture and demonstration of dimorphism is diagnostic.\nReservoir of infection: Soil\nMicroconidia (spores) are the infective form and mode of infection is inhalation.\nPerson to person or animal to man transmission in not known so far for Histoplasmosis.', 'role': 'assistant'}]