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': 'Which is not true about aspergillosis \nSelect and explain. \nA. Aspergillus niger is the commonest cause of fungal otitis externa, B. It is highly contagious, C. Aspergilloma is common in preexisting TB, or cystic disease, D. Aspergillus fumigatus is cause of bronchus aspergillosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]