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: Pathology
[{'content': 'Thrush: \nSelect and explain. \nA. Occurs only in elderly, B. Is caused by a gram -ve bacteria, C. Is seen clinically as a proliferative lesion, D. Responds to nystatin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]