**Core Concept**
Gartner's duct is a remnant of the Wolffian duct in females, which is a vestigial structure that typically regresses during fetal development. It is a potential source of cysts or sinuses in the female reproductive system.

**Why the Correct Answer is Right**
Gartner's duct typically runs along the anterolateral border of the vagina, from the cervix to the labia majora, and can be a source of vaginal cysts or sinuses. The duct is usually lined with a simple columnar epithelium, and its remnants may persist in some females, leading to various clinical manifestations. The presence of Gartner's duct is often an incidental finding during imaging studies or surgical procedures.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not specify the correct anatomical location of Gartner's duct, which is along the anterolateral border of the vagina.
**Option B:** This option is incorrect as it implies that Gartner's duct is a normal anatomical structure in females, whereas it is a vestigial remnant that typically regresses during fetal development.
**Option C:** This option is incorrect as it suggests that Gartner's duct is a source of cysts or sinuses in the male reproductive system, whereas it is a female-specific structure.

**Clinical Pearl / High-Yield Fact**
Gartner's duct cysts are often asymptomatic but can cause symptoms such as pelvic pain, dysuria, or vaginal discharge if they become infected or rupture. A high index of suspicion is required to diagnose Gartner's duct cysts, and imaging studies such as ultrasound or MRI may be necessary to confirm the diagnosis.

**Correct Answer: C.**