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
Myenteric plexus is present in 
Select and explain. 
A. Muscularis externa, B. Submucosa, C. Mucosa, D. Serosa
A: Muscularis externa
Answer: A: Muscularis externa 
Explanation: The myenteric plexus ( Auerbach&;s plexus), is situated between the outer longitudinal and middle circular muscle layers.The submucous plexus ( Meissner&;s plexus) is present between the middle circular layer and mucosa.Collectively these neurons constitute the enteric nervous system.It is also referred to as the " LITTLE BRAIN "(Ref: Ganong&;s Review of medical physiology, 23 rd edition, page 448)