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: Anaesthesia
[{'content': 'Concentration of adrenaline used with lidocaine is? \nSelect and explain. \nA. 0.180555556, B. 1.430555556, C. 1:20000, D. 1:200000', 'role': 'user'}, {'content': 'Answer: D \nExplanation: (334) 1 in 200000 REF: Miller 6th ed p. 589 USES AND DOSES OF ADRENALINE: USE DOSE Anaphylaxis SC or IM injection is 0.3-0.5 mg 1:1,000 Croup Racemic adrenaline is a 1:1 mixture of the dextrototary (d) and levorotatory (1) isomers of adrenaline Local anesthetics 1 in 200000', 'role': 'assistant'}]