**Core Concept**
The question is testing the understanding of the anatomical and physiological homology between male and female reproductive systems, specifically the prostate gland and its equivalent in females. The prostate gland is a part of the male reproductive system, responsible for secreting fluids that nourish and transport sperm.

**Why the Correct Answer is Right**
The correct answer is the Skene's gland, also known as the paraurethral gland or female prostate. It is a small, tubular gland located in the wall of the urethra, near the vaginal opening. The Skene's gland is homologous to the prostate gland in males, as it also produces fluids that contribute to the lubrication of the urethral canal. The Skene's gland is composed of smooth muscle and mucous glands, and its secretions are thought to play a role in the lubrication of the urethra and the maintenance of vaginal health.

**Why Each Wrong Option is Incorrect**
**Option A:** Bartholin's gland - While Bartholin's gland is a gland located in the vulva, it is not homologous to the prostate gland. Instead, it produces mucus that lubricates the vaginal opening.
**Option B:** Clitoris - The clitoris is a highly sensitive organ located in the vulva, but it is not a gland and is not homologous to the prostate gland.
**Option C:** Urethral crest - The urethral crest is a ridge of tissue in the male urethra, but it is not a gland and is not homologous to the prostate gland.

**Clinical Pearl / High-Yield Fact**
It's worth noting that the Skene's gland is often referred to as the "female prostate" due to its anatomical and physiological similarities to the prostate gland in males. However, the Skene's gland is not a direct homologue of the prostate gland, but rather a distinct gland with its own unique function and anatomy.

**Correct Answer:** D. Skene's gland.