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 of the following can be given as a transdermal patch \nSelect and explain. \nA. Flavoxate, B. Tolterodine, C. Oxybutynin, D. Aripiprazole', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Oxybutynin is an anticholinergic that can be given as transdermal patch to control bladder overactivity.', 'role': 'assistant'}]