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': 'Which route of drug administration avoids first pass hepatic metabolism and is used with drug preparation that slowly releases drugs for periods as long as seven days ? \nSelect and explain. \nA. Topical, B. Transdermal, C. Sublingual, D. Oral', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]