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
Newer insulins are - 
Select and explain. 
A. Acidic, B. Alkaline, C. Neutral, D. Monomers
C: Neutral
Answer: C: Neutral 
Explanation: 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)