This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Drugs, Subject name: Medicine
[{'content': 'Drug effective pharmacologic interventions for management of smoking cessation \nSelect and explain. \nA. Bupropion, B. Varenicline, C. Clonidine, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. d (All of the above) (Ref. H-17th/1641; Table 390-3)Effective pharmacologic interventions for cesation of smoking:First-line therapiesSecond-line therapies# Nicotine gum# Clonidine# Nicotine patch# Nortriptyline# Nicotine nasal inhaler # Nicotine oral inhaler # Nicotine lozenge # Bupropion # Varenicline', 'role': 'assistant'}]