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: Pharmacology
[{'content': 'Newer insulins are - \nSelect and explain. \nA. Acidic, B. Alkaline, C. Neutral, D. Monomers', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Neutral o Initially there were neutral and acidic preparations of insulin. Now only neutral insulin preprations are available, also known as regular insulin, except glargine (supplied at acidic pH-4)", 'role': 'assistant'}]