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: Pathology
[{'content': 'Nevi found deep in connective tissue: \nSelect and explain. \nA. Junctional nevi, B. Blue nevi, C. Intramucosal nevi, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Blue color is due to tyndall effect.', 'role': 'assistant'}]