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': 'Total volume of saliva secreted daily is approximately: \nSelect and explain. \nA. 3-3.5 Litr., B. 2-2.5 Litr., C. 0.75-1Litr., D. 1-1.5 Litr.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]