This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Diagnostic criterion for infective endocarditis include all except \nSelect and explain. \nA. Positive echocardiogram, B. Positive blood culture, C. Raised ESR, D. Positive Rheumatoid factor', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ref Harrison 19 th ed pg 820 Many studies that are not diagnostic--i.e., complete blood count, creatinine determination, liver function tests, chest radi- ography, and electrocardiography--are impoant in the management of patients with endocarditis. The erythrocyte sedimentation rate, C-reactive protein level, and circulating immune complex titer are commonly increased in endocarditis', 'role': 'assistant'}]