This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Papulosquamous Disorders, Subject name: Skin
[{'content': 'Leg ulcers are not seen in - \nSelect and explain. \nA. TB, B. Syphilis, C. anemia, D. psoriasis', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans is 'd' i.e., Psoriasis Leg UlcerCausesVascularVenous InsufficiencyVenous Stasis UlcerArteriovenous MalformationArterial or ischemic causesPeripheral Vascular DiseaseBuerger's DiseaseRaynaud's Syndrome (Raynaud's Phenomenon)EmbolismVasculitic UlcerRheumatoid ArthritisSystemic Lupus ErythematosusSclerodermaPolyarteritisLymphaticLymphangitisLymphedemaInfectiousCellulitisOsteomyelitisSyphilisDermatitisContact Dermatitis or other allergic conditionBullous DiseaseMiscellaneousPrimary or metastatic neoplasmTraumaDrug-inducedWarfarinErgotismInjection ulcerPeripheral Neuropathy or PostitioningDiabetic NeuropathyCharcot JointPressure Sore (Decubitus Ulcer)Systemic Diseaseo Diabetes Mellituso Congestive Heart Failureo Malnutritiono Anemia", 'role': 'assistant'}]