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
The following is an impoant feature of psoriasis:September 2009 
Select and explain. 
A. Crusting, B. Silvery Scaling, C. Coarse bleeding, D. Erythematous macules
B: Silvery Scaling
Answer: B: Silvery Scaling 
Explanation: Ans. B: Silvery ScalingPsoriasis is a chronic dermatosis characterized by an unpredictable course of remissions and relapses and presence at typical sites of papules and plaques which are:Well definedErythematousSurmounted with large, silvery, loose scales.