**Core Concept**
Intraventricular hemorrhage (IVH) is a type of bleeding in the brain, specifically within the ventricles, which can occur in premature infants due to the fragility of their blood vessels. It is a significant concern in neonatal care, as it can lead to long-term neurological damage and even death.

**Why the Correct Answer is Right**
Surfactant replacement therapy has been shown to reduce the risk of IVH in premature infants. This is because surfactant helps to lower the surface tension within the lungs, allowing them to expand more easily and reducing the pressure on the blood vessels in the brain. By reducing the pressure, the risk of IVH is decreased. Surfactant also helps to improve lung function, reducing the need for mechanical ventilation and further reducing the risk of IVH.

**Why Each Wrong Option is Incorrect**
**Option A:** Corticosteroids are not effective in reducing the risk of IVH. While they have been shown to improve lung function in premature infants, they do not have a direct effect on reducing the risk of IVH.

**Option B:** Vitamin K administration is not directly related to reducing the risk of IVH. Vitamin K is used to prevent hemorrhagic disease of the newborn, but it does not have a direct effect on the risk of IVH.

**Option C:** Indomethacin is actually used to reduce the risk of patent ductus arteriosus (PDA) in premature infants, but it is not effective in reducing the risk of IVH.

**Clinical Pearl / High-Yield Fact**
Surfactant replacement therapy is a critical component of neonatal care for premature infants, and it is essential to administer it promptly to reduce the risk of IVH and other complications.

**Correct Answer: C. Indomethacin**