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': 'What should be the ideal pH and osmolarity of storage media respectively: \nSelect and explain. \nA. 7.4&320, B. 7.0&300, C. 6.8&280, D. 6.5&250', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]