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 of choice for Impetigo Herpetiformis is 
Select and explain. 
A. Methotrexate, B. Topical calcipotriol, C. Oral sterolds, D. Acitretin
B: Topical calcipotriol
Answer: B: Topical calcipotriol 
Explanation: Impetigo herpetiformis is generalized form of pustutar psoriasis seen in pregnancy.It is the only type of psoriasis where oral steroids are used.In all other types topical steroids are used.