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: Physiology
Gut associated lymphoid tissue (GALT) is primarily located in 
Select and explain. 
A. Lamina propria, B. Submucosa, C. Muscularis, D. Serosa
A: Lamina propria
Answer: A: Lamina propria 
Explanation: Apart from its other functions, gastrointestinal tract is a lymphoid organ. The lymphoid tissue within it is collectively known as Gut Associated Lymphoid Tissue, known as GALT.
Gut Associated Lymphoid Tissue (GALT) is primarily located in lamina propria. 
It may be present diffusely or as solitary or aggregated nodules, known as Peyer's patches in the small intestine.