## **Core Concept**
The question tests knowledge of dermatological conditions characterized by hypo-depigmentation, which refers to a decrease in skin pigmentation. This can be due to various reasons such as genetic conditions, autoimmune diseases, or other pathologies affecting melanin production or distribution.

## **Why the Correct Answer is Right**
Naevus depigmentosus is a congenital benign condition characterized by one or more hypo-pigmented macules or patches. It results from a localized defect in melanin production. The correct answer involves understanding that among the given options, Naevus depigmentosus directly corresponds to a condition known for hypo-depigmentation.

## **Why Each Wrong Option is Incorrect**
- **Option A: Naevas Ito** - This seems to be a confusion or misspelling of "Nevus of Ito," which is a type of dermal melanocytosis and typically presents with hyperpigmentation, not hypopigmentation.
- **Option C: Naevas Otad** - This does not correspond to a recognized dermatological condition related to pigmentation disorders.
- **Option D: Naevas anaemicus** - This condition presents as a localized area of pallor due to vascular factors (e.g., nevus anemicus), not due to a decrease in melanin.
- **Option E: Freckles** - Freckles are areas of skin that have more melanin than the surrounding areas, leading to hyperpigmentation, especially after sun exposure.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that Naevus depigmentosus is a stable, benign condition and does not progress or change over time. It's essential to distinguish it from other pigmentation disorders like vitiligo, which can be progressive.

## **Correct Answer: B. Naevus depigmentosus**