This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of skin, Subject name: Dental
[{'content': 'Merkel cell is derived from \nSelect and explain. \nA. Ectoderm, B. Neural crest, C. Mesoderm, D. Endoderm', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Skin structures derived from two of three primary germ layers. # Ectoderm: epidermis, adnexal structures, Merkel cells, melanocytes (neural crest), and nerves (neuroectoderm) # Mesoderm: fibroblasts, LCs, vessels, and inflammatory cells. Ref:- Review of Dermatology by Alikhan; pg num:-11', 'role': 'assistant'}]