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: Dental
[{'content': 'Macula cerulea is seen in – a) Pediculosis humanis corporisb) Pediculosis capitisc) Pthiris pubisd) Lupus erythematosis \nSelect and explain. \nA. a, B. ac, C. ad, D. b', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Maculae ceruleae (blue - gray macules) occur in pediculosis corporis & P. pubis.', 'role': 'assistant'}]