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.
a. muscularis externa, serosa, mucosa, and submucosa
b. serosa, mucosa, submucosa, and muscularis externa
c. submucosa, serosa, muscularis externa, and mucosa
d. mucosa, submucosa, muscularis externa, and serosa

where is the option.let me know

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave