This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Embryology 1, Subject name: Anatomy
[{'content': 'Chorion is:- \nSelect and explain. \nA. Trophoblast with mesoderm, B. Trophoblast with splanchnopleuric mesoderm, C. Trophoblast with somatopleuric mesoderm, D. None of above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Somatotropic mesoderm along with cytotrophoblast is called chorion. Somatopleuric layer lines the cyto-trophoblast and amnion; and splanchno pleuric layer covers the primary yolk sac. The extra embryonic coelom divides the extra embryonic mesoderm into somatopleuric and splanchnopleuric layers.', 'role': 'assistant'}]