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': 'The rate of oxygen consumption of odontoblasts is \nSelect and explain. \nA. 1.2 +/- 0.2 ml/min/ 100g of pulp tissue, B. 2.2 +/- 0.2 ml/min/ 100g of pulp tissue, C. 3.2 +/- 0.2 ml/min/ 100g of pulp tissue, D. 4.2 +/- 0.2 ml/min/ 100g of pulp tissue', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]