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: Skin
Treatment of choice in Pustuar psoriasis 
Select and explain. 
A. Psorialin + UV therapy, B. Systemic steroid, C. Methotrexate, D. Estrogen
C: Methotrexate
Answer: C: Methotrexate 
Explanation: C i.e. Methotrexate