system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
The following is an impoant feature of psoriasis:September 2009
assistant
The correct answer is  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.