This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Embryology and abdominal wall layer, Subject name: Anatomy
[{'content': 'The simple columnar and stratified columnar epithelia lining the lower pa of the anal canal is derived from \nSelect and explain. \nA. Mesoderm, B. Endoderm, C. Ectoderm, D. Neuroectoderm', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The anal canal is formed from two components--the hindgut and proctodeum. The epithelium lining the lower anal canal is derived from ectoderm lining the proctodeum. above the pectinate line develop from:-endodermal cloacae beiow the pectinate line delelop from :-ectodermal proctodeum', 'role': 'assistant'}]