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

Based on the location given below,write the name of epithelial tissue.
$(i)$ Duct of gland $..... (A) .....$ epithelium
$(ii)$ Fallopian tubes $..... (B) .....$ epithelium
$(iii)$ Air sacs of lungs $..... (C) .....$ epithelium
$(iv)$ Inner lining of stomach $..... (D) .....$ epithelium

Which of the following types of epithelium is present in the bronchioles and Fallopian tubes?

Which protein is responsible for skin color?

What is the primary function of compound epithelium?

Ciliated epithelium is found in: