**Core Concept**
Postpartum hemorrhage (PPH) is a leading cause of maternal mortality worldwide, characterized by excessive uterine bleeding after delivery. Effective management involves a combination of pharmacological and non-pharmacological interventions to control bleeding and restore hemostasis.

**Why the Correct Answer is Right**
The management of PPH involves the use of uterotonic agents to stimulate uterine contractions and reduce bleeding. Options such as oxytocin, carboprost tromethamine (15-methyl-PGF2α), and methylergometrine (ergometrine) are commonly used for this purpose. These agents work by stimulating the uterine muscle to contract, thereby reducing blood loss.

**Why Each Wrong Option is Incorrect**
**Option A:**
* **Option A:** is likely to be a distractor that is actually used in the management of PPH, such as oxytocin or carboprost tromethamine.

**Option B:**
* **Option B:** may be a distractor that is not used in the management of PPH, such as a vasopressin or a direct thrombin inhibitor.

**Option C:**
* **Option C:** could be a distractor that is actually used in the management of PPH, such as methylergometrine (ergometrine) or a combination of uterotonic agents.

**Clinical Pearl / High-Yield Fact**
In the management of PPH, it's essential to remember that uterotonic agents should be administered promptly, and the uterine tone should be assessed regularly to ensure that the bleeding is under control.

**Correct Answer: D.**