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
[{'content': "Which of the following is a secondary cutaneous diseases? \nSelect and explain. \nA. Ichthyosis, B. Psoriasis, C. Lichen planus, D. Reiter's disease", 'role': 'user'}, {'content': "Answer: D \nExplanation: The skin involvement is secondary in Reiter's disease which is primarily characterised by ahritis, urethritis and uveitis. While psoriasis, lichen planus and icthyosis exhibit dermatological manifestations as their primary clinical features. Ref: Harrison's Textbook of Internal Medicine, 17th Edition, Page 2174; Inherited Metabolic Diseases: A Clinical Approach By Georg F. Hoffmann, Johannes Zschocke, William L. Nyhan, Pages 204-205; Psoriasis and Psoriatic Ahritis: An Integrated Approach By Kenneth B. Gordon, Eric M. Ruderman, Pages 23-26, 67-72", 'role': 'assistant'}]