**Core Concept**
The question is testing the student's knowledge of pharmacological interventions to prevent postpartum hemorrhage (PPH), a leading cause of maternal morbidity and mortality. The correct answer is a drug that acts on the uterine muscle to reduce bleeding.

**Why the Correct Answer is Right**
The correct answer is **Carboprost Tromethamine (15-methyl-PGF2α)**, a synthetic prostaglandin analogue. It acts on the uterine muscle to induce sustained uterine contractions, thereby reducing bleeding. Carboprost Tromethamine is specifically used to treat severe postpartum hemorrhage, particularly in cases where uterine atony is the cause. It works by stimulating the prostaglandin FP receptor, leading to increased intracellular calcium and subsequent muscle contraction.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it is not a commonly used medication for preventing postpartum hemorrhage. **Option B:** This option is incorrect because it is not typically used for the initial management of postpartum hemorrhage. **Option D:** This option is incorrect because it is not a medication used to prevent postpartum hemorrhage.

**Clinical Pearl / High-Yield Fact**
Carboprost Tromethamine is a second-line treatment for postpartum hemorrhage, and its use is generally reserved for cases where other treatments have failed. It is essential to note that carboprost can cause side effects such as fever, hypertension, and bronchospasm, so careful monitoring is necessary.

**Correct Answer: C. Carboprost Tromethamine (15-methyl-PGF2α)**