This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Microbiology Pa 1 (History, Microscopy, Stains and Structure and Physiology of Bacteria), Subject name: Microbiology
[{'content': 'In adults , blood culture ratio of blood to reagent is - \nSelect and explain. \nA. 1:05, B. 1:20, C. 1:10, D. 0.111111111', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Blood Culture - For Adults ,the blood is inoculated into the bottle containing blood culture medium in a blood to broth ratio of 1:10 In case of children, where the amount of blood drawn is little , a ratio of 1:5 may be achieved.', 'role': 'assistant'}]