This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
Most commonly used insulin for emergencies of diabetes like diabetes ketoacidosis 
Select and explain. 
A. Lispro, B. Regular, C. Aspa, D. Glargine
B: Regular
Answer: B: Regular 
Explanation: Regular-actrapid insulin is most commonly used for DKA, Hyperosmolar coma. But the ultra long acting and ultra shio accting insulin are not preferred in emergency situations. other treatment for DKA is 0.9% normal saline , regular insulin I.V,management o f metabolic acidosis due to ketone bodies . Ref: Katzung 12 th ed.