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
Meissner's plexus are present in: 
Select and explain. 
A. Mucosa, B. Submucosa, C. Muscularis layer, D. Serosa
B: Submucosa
Answer: B: Submucosa 
Explanation: 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