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 pustular psoriasis is : 
Select and explain. 
A. Thalidomide, B. Retinoids, C. Hydroxyurea, D. Metholtrexate
B: Retinoids
Answer: B: Retinoids 
Explanation: B i.e. Retinoids