**Core Concept**
USG (Ultrasonography) at 32-36 weeks of gestation is a crucial period for fetal assessment, particularly for the evaluation of fetal growth, well-being, and potential complications. The primary goal is to identify high-risk pregnancies that may require closer monitoring or intervention.

**Why the Correct Answer is Right**
At 32-36 weeks, USG is essential for detecting fetal growth restriction (FGR), which is characterized by impaired fetal growth and development due to inadequate placental function. The sonographic evaluation includes assessing fetal weight, abdominal circumference, and estimated fetal weight (EFW). Additionally, USG helps in identifying other complications such as oligohydramnios (decreased amniotic fluid), polyhydramnios (excessive amniotic fluid), and placental abruption. The presence of these conditions can be life-threatening to the fetus and requires prompt medical attention.

**Why Each Wrong Option is Incorrect**
* **Option A:** Fetal growth restriction is a valid indication for USG at 32-36 weeks. This condition necessitates regular monitoring to prevent adverse outcomes.
* **Option B:** Polyhydramnios is indeed a condition that can be detected using USG at 32-36 weeks. It is characterized by excessive amniotic fluid and can be associated with fetal anomalies or maternal diabetes.
* **Option C:** Placental abruption, which involves the premature separation of the placenta from the uterus, is also a valid indication for USG at 32-36 weeks. This condition can lead to fetal distress and requires prompt medical attention.

**Clinical Pearl / High-Yield Fact**
A key aspect to remember is that USG at 32-36 weeks is not only essential for detecting fetal growth restriction and other complications but also for assessing fetal well-being. Fetal biophysical profile (FBP) is a scoring system used to evaluate fetal well-being, which includes parameters such as fetal tone, breathing, and movement.

**Correct Answer: D.**