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: Skin
[{'content': 'The daily dose of thalidomide for controlling E.N.L. is : \nSelect and explain. \nA. 100 mg, B. 200 - 300 mg, C. 500 mg, D. 1000 mg only', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. 200 - 300 mg', 'role': 'assistant'}]