The innermost layer of human alimentary canal forms numerous finger-like projections in the small intestine which are known as
a)	Villi	b)	Rugae	c)	Peyer’s patches	d)	Both (a) and (b)

(a)

Mucosa lines the lumen of alimentary canal. These innermost layers forms irregular folds in the stomach, which are called rugae. Villi, the small finger like projections are also formed by mucosa in small intestine. The cells lining the villi produce numerous microscopic projections called microvilli. The later give a brush boarder appearance. The villi in small intestine increasing the surface area for the absorption of food