This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: VBDs, Arboviral & Viral Infections, Surface Infections, Subject name: Social & Preventive Medicine
[{'content': "Causative agent for 'Oriental sore' is:- \nSelect and explain. \nA. Leishmania donovoni, B. Leishmania tropica, C. Leishmania braziliensis, D. Onchocerca volvulus", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Leishmania tropica causes Cutaneous leishmaniasis and Oriental Sore. Leishmania donovoni causes Visceral leishmaniasis. (Kala azar) Leishmania brazeliensis causes Muco-cutaneous leishmaniasis. Onchocerca volvulus cause Onchocerciasis. (River blindness)', 'role': 'assistant'}]