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': 'Stalicite growth is by: \nSelect and explain. \nA. Yersenia, B. Mycoplasma, C. Diptheria, D. Clostridia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Yersenia', 'role': 'assistant'}]