In the wall of alimentary canal which are/is true sequence from outer to inner

Options

(a) Serosa,longitudinal muscle,mucosa,sub mucosa
(b) Mucosa, serosa, long muscle
(c) Serosa, long muscle, circular, sub-mucosa, mucosa
(d) Serosa, long muscle, sub-mucosa, mucosa

Correct Answer:

Serosa, long muscle, circular, sub-mucosa, mucosa

Explanation:

The wall of alimentary canal is made up of four basic layers.First of all there is serosa which is a thin membranous covering around oesophagus.Then there is muscle layer-outer layer of longitudinal muscles and inner layer of circular muscles .Last there is submucosa which contains a few oesophageal glands.Then comes mucose which have several layers of flattened cells.