Drug not causing exatithematous skin eruption –: (A) Phenytoin, (B) Hydrocortisone, (C) Ampicillin, (D) Phenylbutazone
Answer is B. 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.