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
Most malignant type of pustular psoriasis is ? 
Select and explain. 
A. Palmo - planter pustolosis, B. Acrodermatitis continua, C. Pustular bacterids, D. Von Zumbusch type
D: Von Zumbusch type
Answer: D: Von Zumbusch type 
Explanation: Ans. is'd'i.e., Von Zumbusch typeVon Zumbusch type of pustular psoriasis is the suddenly developing most serious type, characterized by severe systemic upset, swinging pyrexia, ahralgia and high polymorphonuclear lymphocytes.The skin first becomes erythrodermic and then develops sheets of sterile pustules over trunk and limbs.Pustules become confluent to from "lakes of pus".