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: Anatomy
[{'content': 'Embryologically corneal stroma is derived from which of the following layers? \nSelect and explain. \nA. Neural crest, B. Ectoderm, C. Mesoderm, D. Endoderm', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Corneal stroma, keratocytes and endothelium is derived from the Neural crest.', 'role': 'assistant'}]