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': 'Germ tubes are formed mainly by: \nSelect and explain. \nA. Candida albicans, B. Candida stellatoidea, C. Candida tropicalis, D. Candida pseudotropicalis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]