**Core Concept**
Hyperlension during labor is a serious condition that requires prompt management to prevent complications for both the mother and the fetus. The goal is to lower blood pressure while maintaining fetal well-being, and the choice of medication is crucial.

**Why the Correct Answer is Right**
In acute hypertension during labor, beta-2 agonists such as ritodrine are often used to manage blood pressure. They work by stimulating beta-2 receptors, leading to vasodilation and a decrease in peripheral resistance. This helps to lower blood pressure while minimizing the risk of fetal compromise.

**Why Each Wrong Option is Incorrect**
**Option A:** Labetalol is a mixed alpha and beta-blocker, often used in managing hypertension during labor. It can be administered in acute hypertension during labor, making it incorrect as the correct answer.
**Option B:** Hydralazine is a vasodilator that can be used to lower blood pressure in acute hypertension during labor. It is a common choice for managing this condition.
**Option C:** Nifedipine is a calcium channel blocker that can also be used to manage hypertension during labor. It works by inhibiting calcium entry into vascular smooth muscle cells, leading to vasodilation and a decrease in blood pressure.

**Clinical Pearl / High-Yield Fact**
In managing acute hypertension during labor, it's essential to choose medications that have a rapid onset of action and can be easily titrated to achieve the desired effect. Also, always consider the potential effects on fetal well-being and the mother's cardiovascular system.

**Correct Answer: D**