This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
[{'content': 'Which is the most stable suture layer in all sections of the gastrointestinal tract? \nSelect and explain. \nA. Mucosa, B. Submucosa, C. Muscularis, D. Serosa', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Submucosa layer, because of its high collagen content and is the most stable suture layer in all sections of the gastrointestinal tract. Ref: Bailey and Love 27e pg: 98', 'role': 'assistant'}]