**Core Concept**
The stratum granulosum is a thin layer of cells in the epidermis, where keratinocytes undergo final differentiation and produce granules containing enzymes. This layer is crucial in the process of skin barrier formation.

**Why the Correct Answer is Right**
The stratum granulosum is not present in the mucous membranes, which do not undergo the same type of keratinization as the skin. In mucous membranes, the stratum basale is the deepest layer, followed by the stratum spinosum, stratum lucidum (when present), and then the stratum corneum. The absence of granules and the stratum granulosum in mucous membranes is due to the lack of need for a thick, impermeable barrier in these areas.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided, so we cannot evaluate its correctness.
**Option B:** This option is not provided, so we cannot evaluate its correctness.
**Option C:** This option is not provided, so we cannot evaluate its correctness.
**Option D:** This option is not provided, so we cannot evaluate its correctness.

**Clinical Pearl / High-Yield Fact**
The stratum granulosum is a thin layer that can be easily damaged, leading to skin conditions such as eczema or dermatitis. Understanding the differences between skin and mucous membranes is essential for diagnosing and treating various skin conditions.

**Correct Answer:** D.