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: Dental
[{'content': 'Drug not causing exatithematous skin eruption – \nSelect and explain. \nA. Phenytoin, B. Hydrocortisone, C. Ampicillin, D. Phenylbutazone', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Drugs causing exanthematic reactions\n\nMost common : - Ampicillin and penicillin, Phenylbutazone and other pyrazolones, Sulphonamides, Phenytoin,\nCarbamazepine, Gold, Gentamicin, Meprobamate, Atropine\nLess common : - Cephalosporins, Barbiturates, Thiazides, Naproxen, Isoniazid, Phenothiazines, Quinidine.', 'role': 'assistant'}]