## **Core Concept**
Placenta previa is a condition in pregnancy characterized by the placenta partially or wholly covering the internal cervical os. This condition can lead to severe maternal bleeding (antepartum hemorrhage) and poses significant risks to both mother and fetus. The management and diagnosis of placenta previa involve understanding its classification and associated clinical features.

## **Why the Correct Answer is Right**
The correct answer relates to a true statement about placenta previa. Although the specific options are not provided, a commonly accepted true statement about placenta previa is that it is associated with a risk of severe maternal bleeding. This condition is classified into several types, including marginal, partial, and complete (total) placenta previa, based on the extent of cervical os coverage. The risk of bleeding increases with the proximity of the placenta to the internal cervical os.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Without the specific details of option A, a general approach to evaluating incorrect options involves identifying statements that contradict established medical knowledge about placenta previa, such as its causes, symptoms, or management strategies.
- **Option B:** Similarly, option B would be considered incorrect based on its deviation from recognized facts about placenta previa, such as its association with multiparity, advanced maternal age, or previous uterine surgery.
- **Option C:** This option, presumably another incorrect choice, might pertain to a misunderstanding of the condition's diagnosis, treatment, or complications.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl regarding placenta previa is that painless vaginal bleeding in the second or third trimester is a hallmark symptom. The management often involves careful monitoring, bed rest, and possible delivery by cesarean section, depending on the severity and gestational age. A critical point for exams is recognizing that placenta previa is a cause of painless, bright red vaginal bleeding.

## **Correct Answer: D.**