Epithelial tissue which lines the spinal cord is known as

The surface of blood vessels and air sacs of lungs is made up of which type of epithelium?

Match the following:

Column-$I$	Column-$II$
$(a)$. Squamous epithelium	$(i)$ Lining of intestine
$(b)$. Cuboidal epithelium	$(ii)$ Ovary
$(c)$. Columnar epithelium	$(iii)$ Blood vessels
$(d)$. Ciliated epithelium	$(iv)$ Bronchioles

Which of the following statements are correct for the tissue shown in the image?
$I$ - Flattened cells with irregular boundaries
$II$ - Secretory cells
$III$ - Single-layered
$IV$ - Found in the walls of blood vessels and air sacs of lungs
$V$ - Functions as a diffusion boundary

Match column-$I$ (type of epithelium) with column-$II$ (Description) and choose the correct option.

Column-$I$ (Types of epithelium)	Column-$II$ (Description)
$A$. Squamous	$I$. It is composed of a single-layer epithelium of cube-like cells
$B$. Cuboidal epithelium	$II$. Having cilia on their free surface
$C$. Columnar	$III$. It is composed of a single epithelium layer of tall and slender cells
$D$. Ciliated	$IV$. It is made up of a single thin layer of flattened cells with irregular boundaries

Identify the location and function of the following structures:
$(i)$ Malpighian layer
$(ii)$ Adipose tissue