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: Dental
[{'content': 'In case of surgery indicated dose of LA should be: \nSelect and explain. \nA. 1:80, 000, B. 1:1,00,000., C. 1: 50,000., D. 1:2,00,000', 'role': 'user'}, {'content': 'Answer: C \nExplanation: High dose of epinephrine is required to control bleeding.', 'role': 'assistant'}]