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: Surgery
[{'content': 'The dose of epinephrine given in anaphylaxis: \nSelect and explain. \nA. 0.5 mg in 1:1000 IM, B. 0.5 mg in 1:10,000 IM, C. 0.5 mg in 1:500 IM, D. 1 mg in 1:100 IM', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]