The figure shows different human tissues labelled as A to D . Which...

The given figure $\mathrm{A}$ is squamous epithelium, found in walls of blood vessels and air sacs of lungs and is involved in functions like forming a diffusion layer. B is cuboidal epithelium, found in ducts of glands and tubular parts of nephrons of kidney and its main functions are secretion and absorption. $\mathrm{C}$ is columnar epithelium, found in lining of stomach and intestine and helps in secretion and absorption. D is ciliated columnar epithelium, present in inner surface of hollow organs like bronchioles and Fallopian tubes and helps to move particles or mucus in a specific direction over the epithelium.