This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pancreas, Subject name: Pharmacology
[{'content': 'What percentage of Lente Insulin is amorphous? \nSelect and explain. \nA. 70%, B. 30%, C. 50%, D. 90%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Insulin Lente is 70% crystalline (ultra lente) and 30% amorphous (semi lente). It is an insulin - zinc suspension', 'role': 'assistant'}]