Which protein provides color to the body?

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

$A$ tissue is formed by the organization of which of the following?

Cuboidal epithelium is located in

Which of the following statements is/are correct regarding epithelial tissue?
$a$ - Cells are compactly packed.
$b$ - Cells have little intercellular matrix.
$c$ - It can be single or multi-layered.

Sweat glands are -