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: Medicine
[{'content': 'Resistant kala-azar is defined by the persistance of the following feature despite adequate therapy \nSelect and explain. \nA. Fever, B. Non-regression of splenomegaly, C. L.D. bodies in more than 5% cells in bone marrow, D. Hyperglobulinaemia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]