## Core Concept
Dietary fibers are non-digestible carbohydrates that are not broken down by the body's digestive enzymes. They are primarily composed of **polysaccharides**, **cellulose**, **hemicellulose**, and **pectin**, which are found in plant cell walls. These compounds play a crucial role in maintaining gastrointestinal health.

## Why the Correct Answer is Right
The correct answer, , includes **cellulose**, **hemicellulose**, and **pectin**, all of which are types of dietary fibers. Cellulose and hemicellulose are key components of plant cell walls, providing structural support, while pectin is a soluble fiber found in the cell walls of fruits, particularly in the skin and core. These fibers help in increasing bulk, promoting satiety, and supporting healthy bowel movements.

## Why Each Wrong Option is Incorrect
* **Option A:** - This option is incorrect because **starch** is a digestible carbohydrate, used by the body for energy.
* **Option B:** - This option is incorrect because it does not accurately represent a category of dietary fiber; while **glycogen** is a form of carbohydrate storage in animals, it is not classified as a dietary fiber.
* **Option D:** - This option might seem plausible but is incorrect based on the accurate classification and examples of dietary fibers provided in the correct answer.

## Clinical Pearl / High-Yield Fact
A key point to remember is that dietary fibers can be classified into **soluble** and **insoluble** types. Soluble fibers (like pectin) dissolve in water to form a gel-like substance, helping to lower cholesterol levels. Insoluble fibers (like cellulose and hemicellulose) do not dissolve in water and help add bulk to stool, promoting regular bowel movements.

## Correct Answer: C.