From the esophagus to the anal canal, the walls of every organ of the alimentary canal are made up of the same four basic layers. Arrange them in order from the lumen to the external layer.
muscularis externa, serosa, mucosa, and submucosa
serosa, mucosa, submucosa, and muscularis externa
submucosa, serosa, muscularis externa, and mucosa
mucosa, submucosa, muscularis externa, and serosa