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: Dental
[{'content': 'Osteoblasts appear basic gram staining due to: \nSelect and explain. \nA. Increased ribonucleic acid, B. Acidic ground substance, C. Increased mitochondria, D. Presence of basic ground substance', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]