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: Physiology
[{'content': 'Which of the following biological fluids has the highest pH value? \nSelect and explain. \nA. Bile, B. Pancreatic juice, C. Saliva, D. Gastric juice', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Pancreatic juice is alkaline and has the highest pH (7.8 - 8.0). Pancreatic juice is alkaline in nature due to the high concentration of bicarbonate ions.', 'role': 'assistant'}]