**Core Concept**
Koebner's phenomenon is a dermatological condition where skin lesions appear on areas of the body that have experienced trauma, such as cuts, burns, or even insect bites. This phenomenon is a hallmark of certain autoimmune and inflammatory skin disorders.

**Why the Correct Answer is Right**
Koebner's phenomenon is a characteristic feature of psoriasis, a chronic autoimmune skin condition. When the skin is injured, the immune system mistakenly attacks healthy skin cells, leading to the formation of new lesions. This is due to the activation of T-cells and the release of pro-inflammatory cytokines, which trigger an inflammatory response. The resulting lesions can be similar in appearance to the original psoriatic plaques.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because while eczema (atopic dermatitis) can exhibit some similarities with psoriasis, Koebner's phenomenon is not a defining characteristic of this condition.
**Option B:** This option is incorrect because vitiligo is a condition characterized by the loss of skin pigment, and while it can be triggered by trauma, it does not typically exhibit Koebner's phenomenon.
**Option C:** This option is incorrect because acne is a condition primarily related to clogged pores and bacterial infections, and it does not typically exhibit Koebner's phenomenon.

**Clinical Pearl / High-Yield Fact**
A key feature of psoriasis is the presence of Munro's microabscesses, which are collections of neutrophils in the epidermis. These microabscesses are a hallmark of psoriasis and can be used to distinguish it from other skin conditions.

**Correct Answer: D. Psoriasis.**