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: Gynaecology & Obstetrics
[{'content': "The colour of vulva in Paget's disease is : \nSelect and explain. \nA. Blue, B. White, C. Red, D. Yellow", 'role': 'user'}, {'content': 'Answer: B \nExplanation: White', 'role': 'assistant'}]