**Core Concept**
Placenta accreta is a serious pregnancy complication characterized by the abnormal invasion of the placenta into the uterine wall. This condition is often associated with uterine scars, which can disrupt the normal placental implantation process.

**Why the Correct Answer is Right**
Placenta accreta is strongly linked to previous uterine surgeries, such as cesarean sections (LSCS), curettages, and myomectomies. These procedures can lead to the formation of fibrotic tissue, which can interfere with placental implantation and increase the risk of placenta accreta. In contrast, placenta previa, a condition where the placenta partially or completely covers the cervical os, is not a risk factor for placenta accreta. In fact, placenta previa is often associated with a different set of complications, such as antepartum hemorrhage and fetal growth restriction.

**Why Each Wrong Option is Incorrect**
**Option A:** A previous LSCS scar is a well-established risk factor for placenta accreta, as it can lead to the formation of fibrotic tissue and disrupt normal placental implantation.
**Option B:** Previous curettage, particularly in the second trimester, can also increase the risk of placenta accreta by creating a scarred uterine environment.
**Option C:** Previous myomectomy, particularly if performed in the lower uterine segment, can also increase the risk of placenta accreta due to the formation of fibrotic tissue and disruption of normal placental implantation.

**Clinical Pearl / High-Yield Fact**
It is essential for healthcare providers to recognize the risk factors for placenta accreta, particularly in patients with a history of uterine surgeries. A high index of suspicion and early ultrasound evaluation can help identify patients at risk and facilitate timely management.

**✓ Correct Answer: D. Previous placenta prae**