**Core Concept**
Diabetes mellitus in pregnancy is a complex condition that affects both the mother and the fetus. It is characterized by hyperglycemia, which can lead to various complications during pregnancy, delivery, and postpartum.

**Why the Correct Answer is Right**
The correct answer includes three key features of diabetes mellitus in pregnancy. **Hydramnios (b)** is a condition where there is an excessive accumulation of amniotic fluid, often seen in pregnancies complicated by diabetes. This is due to fetal macrosomia, which can lead to increased fetal urine production and subsequent fluid accumulation. **Neonatal hyperglycemia (c)** is a common feature of diabetic pregnancies, as the fetus produces excess insulin in response to maternal hyperglycemia, leading to high blood glucose levels at birth. **Increased congenital defects (d)** are a well-known complication of diabetes in pregnancy, as high glucose levels can lead to fetal malformations and developmental abnormalities.

**Why Each Wrong Option is Incorrect**
**Option A:** Postdatism is a condition of prolonged gestation, which is not a direct feature of diabetes mellitus in pregnancy. While diabetes can increase the risk of postdatism, it is not a characteristic feature.

**Option B:** While PPH (Postpartum Hemorrhage) is a potential complication of any pregnancy, it is not a specific feature of diabetes mellitus in pregnancy.

**Option C:** This option is incorrect because congenital defects are indeed a feature of diabetes in pregnancy, but postdatism is not.

**Clinical Pearl / High-Yield Fact**
In diabetic pregnancies, it is essential to monitor fetal growth carefully, as macrosomia can lead to complications during delivery. A fetal weight of more than 4 kg is considered macrosomic and may require special delivery planning.

**Correct Answer:**
✓ Correct Answer: A. bde