This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Embryology, Subject name: Anatomy
[{'content': 'Gut tube develops from which germ layer? \nSelect and explain. \nA. Endoderm, B. Mesoderm, C. Ectoderm, D. Allantois', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Endoderm * The gut is endodermal in origin and is derived from yolk sac.", 'role': 'assistant'}]