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
Drug not causing exatithematous skin eruption – 
Select and explain. 
A. Phenytoin, B. Hydrocortisone, C. Ampicillin, D. Phenylbutazone
B: Hydrocortisone
Answer: B: Hydrocortisone 
Explanation: Drugs causing exanthematic reactions

Most common : - Ampicillin and penicillin, Phenylbutazone and other pyrazolones, Sulphonamides, Phenytoin,
Carbamazepine, Gold, Gentamicin, Meprobamate, Atropine
Less common : - Cephalosporins, Barbiturates, Thiazides, Naproxen, Isoniazid, Phenothiazines, Quinidine.