**Core Concept**
The Wolffian duct is a paired embryonic structure that gives rise to the male reproductive system, but in females, most of it regresses. However, remnants of the Wolffian duct can be found in adult females, and identifying these remnants is crucial for understanding the development of the female reproductive system.

**Why the Correct Answer is Right**
The Kobelt tubercle is a small elevation found on the lateral wall of the vagina in adult females. It is a remnant of the Wolffian duct, specifically the paraoophoral duct, which is the portion of the Wolffian duct that is closely associated with the ovary. The paraoophoral duct is thought to play a role in the development of the female reproductive system, particularly in the formation of the fallopian tube and the surrounding ovarian ligaments.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the paroophoron is a different remnant of the Wolffian duct, which is found in the mesosalpinx, not the vaginal wall.
**Option B:** This option is incorrect because the epoophoron is another remnant of the Wolffian duct, but it is found in the mesosalpinx, not the vaginal wall.
**Option C:** This option is incorrect because the paradidymis is a remnant of the Wolffian duct, but it is found in the male reproductive system, not the female.

**Clinical Pearl / High-Yield Fact**
Remember that remnants of the Wolffian duct can be found in adult females, and identifying these remnants is crucial for understanding the development of the female reproductive system.

**Correct Answer: D. Kobelt tubercle is remnant of the paraoophoral duct in females.**