What are the three types of epithelial tissue?

• A. Stratified, glandular, and simple
• B. Epithelial, connective, and muscular
• C. Pseudostratified, cuboidal, and transitional
• D. Simple, stratified, and transitional

Answer: (A)

Epithelial tissue is categorized by how many cell layers they have and by their functional specialization. The main layering types are simple (one cell layer) and stratified (multiple layers), with a related concept that the tissue can be glandular in nature, forming glands for secretion. So the three broad types you often see described are simple, stratified, and glandular epithelium. This is why the correct choice is the best: it captures both the layering distinction (simple vs stratified) and the glandular form as a functional category. The other options mix in tissues that aren’t epithelial (like connective or muscle) or refer to specific shapes or arrangements that aren’t used here as the primary three categories, making them less fitting for the question's framing.