What type of epithelium is found in the trachea?

Choose the correct sentences for compound epithelium:
$(I)$ Compound epithelium is made of multi-layered cells.
$(II)$ It has a limited role in secretion and absorption.
$(III)$ It provides protection against chemical and mechanical stresses.
$(IV)$ It is present in $PCT$.

Reproductive cells $(germinal\ \text{epithelium})$ are made up of which of the following epithelial tissue?

$A$: Intercellular material is minimum between the cells of epithelial tissue.
$R$: Epithelial cells are not secretory in nature.

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

Urethra, vagina and oesophagus have a common inner lining of