This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology Pa 3 (Graft, Autoimmunity, Immunodeficiency Disorders), Subject name: Microbiology
[{'content': 'Causative organism of tropical spastic paraparesis is? \nSelect and explain. \nA. HIV 1, B. HIV 2, C. HBV, D. HTLV', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Tropical spastic paraparesis(TSP) is a disease of the spinal cord caused by Human T cell lymphotropic virus(HTLV). Alternate names: HTLV associated myelopathy, chronic progressive myelopathy. Paraparesis is a characteristic feature. Other features include uveitis, ahritis, alveolitis, polymyositis, keratoconjunctivitis sicca and infectious dermatitis.', 'role': 'assistant'}]