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
Merkel cell is derived from 
Select and explain. 
A. Ectoderm, B. Neural crest, C. Mesoderm, D. Endoderm
A: Ectoderm
Answer: A: Ectoderm 
Explanation: 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