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': 'Gut Associated Lymphoid Tissue (GALT) is primarily located in which layer of small intestine? \nSelect and explain. \nA. Lamina Propria, B. Submucosa, C. Muscularis, D. Serosa', 'role': 'user'}, {'content': "Answer: A \nExplanation: GALT is composed of aggregated tissue in the form of peyer's patches and lymphnode follicles, and non-aggregated cells in Lamina propria and intraepitheial regions of small intestine. Ref: The Immunomodulatory Effects of Dietary Fibers and Prebiotics in The Gastrointestinal Tract By Teresa M. Paeschke, William R. Aimutis, Chapter 3; Nondigestible Carbohydrates and Digestive Health, Page 1974", 'role': 'assistant'}]