**Core Concept**
A nabothian cyst is a benign, self-limiting lesion that arises from the transformation of the reserve cells of the cervical gland. This process involves the squamous epithelium occluding the gland's opening, leading to cystic dilation.

**Why the Correct Answer is Right**
The statement that a nabothian cyst is pre-malignant is incorrect. Nabothian cysts are caused by the occlusion of the gland's mouth by squamous epithelium, leading to cystic dilation. This is a benign process and does not have any malignant potential. The reserve cells in the cervix are capable of differentiating into squamous epithelium, which can occlude the gland's opening.

**Why Each Wrong Option is Incorrect**
**Option A:** This statement is correct as the squamous epithelium occludes the mouth of the gland, which is a key factor in the formation of a nabothian cyst.
**Option B:** This statement is correct as nabothian cysts are often seen in association with chronic irritation and inflammation of the cervix.
**Option C:** This statement is correct as nabothian cysts are a pathology of the cervix, specifically arising from the glandular epithelium.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that nabothian cysts are benign and do not have any malignant potential. They are often seen in association with chronic irritation and inflammation of the cervix and can be easily managed with simple excision or biopsy if necessary.

**Correct Answer:**
✓ Correct Answer: D. It is pre - malignant.