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: Unknown
Treatment of choice in Pustular psoriasis - 
Select and explain. 
A. Psorialin - UV therapy, B. Systemic steroid, C. Methotrexate, D. Estrogen
C: Methotrexate
Answer: C: Methotrexate 
Explanation: Ans-Cillustrated Synopsis of Dermatology and Sexually Transmitted Diseases - Neena Khanna. TOC of Pustular Psoriasis - 1.Hands and Feet involvement - Topical high-potency steroids + Salicylic acid Topical PUVA/PUVA sol. 2 . Generalized PP- Methotrexate + emollients.