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
Arrange the insulin in order of their duration of action (shoest first and longest last) a. NPH b. Glargine c. Detemir d. Degludec 
Select and explain. 
A. d<a<c<b, B. a<c<b<d, C. b<a<d<c, D. c<d<a<b
B: a<c<b<d
Answer: B: a<c<b<d 
Explanation: Duration of action of insulin : a<c<b<d a. NPH- Intermediate Acting(10-20h) b. Glargine- Long Acting(20-24h)- pH-Acidic c. Detemir - Long acting(16-24h) d. Degludec- Longest acting (>40h)