This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Physiology
[{'content': "Meissner's plexus are present in: \nSelect and explain. \nA. Mucosa, B. Submucosa, C. Muscularis layer, D. Serosa", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans: B (Submucosa) Ref: Ganong Medical Physiology, 21st ed.Explanation:All segments of the Gl tract are divided into four layers:The mucosa (epithelium, lamina propria, and muscular mucosae)The submucosa (Meissner's plexus)The muscularis propria (inner circular muscle layer, intermuscular space and outer longitudinal muscle layer) (Myenteric Auerbach plexus - between longitudinal and circular layers)The serosa", 'role': 'assistant'}]