**Core Concept**
A cesarean section (C-section) is a surgical delivery method where a baby is born through incisions in the abdomen and uterus. Absolute indications for C-section are conditions that pose a significant risk to the mother's or baby's life if vaginal delivery is attempted.

**Why the Correct Answer is Right**
The correct answer is **Placenta Previa**. Placenta Previa is a condition where the placenta partially or completely covers the internal cervical os (the opening of the uterus into the vagina). This can lead to severe bleeding during pregnancy or labor, posing a significant risk to the mother's life. In such cases, a C-section is the safest option to prevent maternal and fetal morbidity and mortality.

**Why Each Wrong Option is Incorrect**
* **Option A:** **Breech Presentation** is a relative indication for C-section, not an absolute indication. Vaginal delivery can still be attempted in some cases, and the decision is often made based on the baby's position and the mother's overall health.
* **Option B:** **Fetal Distress** is a relative indication for C-section. Fetal distress can be managed with other interventions, such as cesarean delivery under emergency conditions or with the assistance of a neonatologist.
* **Option C:** **Gestational Diabetes Mellitus** is a relative indication for C-section, often depending on the severity of the condition, fetal weight, and other factors. Vaginal delivery may still be possible with proper management.

**Clinical Pearl / High-Yield Fact**
Placenta Previa is often associated with a history of uterine surgery, such as a previous C-section or dilation and curettage (D&C). This is because the placenta may implant in the lower uterine segment, which is more prone to scarring.

**Correct Answer: D. Placenta Previa**