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': 'Lichenisation occurs in which layer of skin\xad- \nSelect and explain. \nA. Stratum malpighi, B. Stratum corneum, C. Stratum hucidum, D. Stratum granulosum', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The Malpighian layer of the skin is generally defined as both the stratum basale and stratum spinosum as a unit, although it is occasionally defined as the stratum basale specifically,or the stratum spinosum specifically.\nIt is named after Marcello Malpighi', 'role': 'assistant'}]