**Core Concept**
The lymphatic drainage of the cervix is primarily to the pelvic lymph nodes. This knowledge is crucial for understanding the spread of cervical cancer. The **cervix** has a rich network of lymphatic vessels that drain to various lymph node groups in the pelvis.

**Why the Correct Answer is Right**
The correct answer involves the primary lymphatic drainage sites of the cervix, which include the **iliac lymph nodes**, specifically the **external iliac**, **internal iliac (hypogastric)**, and sometimes the **common iliac lymph nodes**. The **obturator lymph nodes** are also part of this drainage system, as they are located near the obturator internus muscle and receive lymph from the cervix.

**Why Each Wrong Option is Incorrect**
**Option A:** Inguinal lymph nodes are not the primary site for lymphatic drainage from the cervix. **Option B:** Femoral lymph nodes, while related to the inguinal nodes, are not directly involved in the primary drainage of the cervix.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that the lymphatic drainage of the cervix is to the pelvic lymph nodes, including the external iliac, hypogastric, and sometimes the common iliac and obturator nodes. This is crucial for understanding the potential spread of cervical cancer.

**Correct Answer:** D. External iliac lymph nodes