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': 'The following insulin can be given intravenously? \nSelect and explain. \nA. Protamine zinc insulin, B. Ultra lente insulin, C. Semi lente insulin, D. Regular insulin', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Regular insulin o All preparations are administered by S.C. route except regular insulin which can be given", 'role': 'assistant'}]