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
Insulin of choice in a patient with Diabetic ketoacidosis? 
Select and explain. 
A. Lispro, B. Deterimer, C. Aspart, D. Regular Insulin
D: Regular Insulin
Answer: D: Regular Insulin 
Explanation: Regular Insulin is short acting formulation given intravenously in cases of Diabetic ketoacidosis.