Pseudostratified epithelium is found in:
Though the pseudostratified epithelium appears multilayered, it consists of a single layer of columnar cells that are irregularly shaped and differently sized. It appears to be so because the nuclei of these pseudostratified epithelial cells are located at different levels. These cells are commonly found in the linings of the trachea and salivary glands.
So, the correct answer is option 'B'.