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: Unknown
Not a treatment option for psoriasis - 
Select and explain. 
A. Retinoids, B. Methotrexate, C. Cyclosporine, D. Oral corticosteroids
D: Oral corticosteroids
Answer: D: Oral corticosteroids 
Explanation: Ans is 'd' i.e. Oral corticosteroids Treatment options for psoriasisSystemic medicineso Acitretino Cyclosporineo Razoxaneo Biological therapieso Colchicineo Antithyroid drugs (methimazole, propylthiouracil)o Methotrexateo Hydroxyureao Mycophenolate mofetilo Goldo Zidovudineo AzathioprineTopical medicines for psoriasiso Emollientso Dithranolo Salicylic acido Tazaroteneo Topical corticosteroidso Taro Vit D and Analogueso Tacrolimus and pimecrolimus