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': 'Staphylococcal bacteria are \nSelect and explain. \nA. Gram negative, B. Tend to form chains, C. Found in grape like clusters, D. Associated with dental caries', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]