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': "A melanocytic naevus surrounded by a depigmented halo is called: \nSelect and explain. \nA. Sutton's nevus, B. Meyerson's naevus, C. Cockade naevus, D. Nevus anaemicus", 'role': 'user'}, {'content': "Answer: A \nExplanation: Sutton's nevus/halo's nevus : a halo of depigmentation appears around a preexisting melanocytic naevus. Meyerson's naevus is used to describe a melanocytic naevus that has developed an associated inflammatory reaction, which looks like eczema. Ref: Rook's textbook of dermatology, 8th edition Pg 54.20.", 'role': 'assistant'}]