## **Core Concept**
Hyaline membrane disease (HMD), also known as respiratory distress syndrome (RDS), primarily affects premature infants. It is caused by a deficiency of **surfactant**, a substance that reduces surface tension in the lungs, allowing for easier expansion during breathing. The disease is characterized by the formation of hyaline membranes in the airspaces of the lungs.

## **Why the Correct Answer is Right**
The correct answer relates to the pathophysiology of hyaline membrane disease. In HMD, the lack of surfactant leads to increased surface tension within the alveoli, making lung expansion more difficult. This results in atelectasis (alveolar collapse) and decreased lung compliance. The condition necessitates the formation of hyaline membranes, which are composed of fibrin, cellular debris, and proteins, lining the airspaces. This process is directly related to the deficiency of surfactant, which is crucial for reducing surface tension.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because it does not accurately describe a characteristic feature of hyaline membrane disease. Without the specific details of option A, we can infer that any option not directly related to surfactant deficiency, hyaline membrane formation, or clinical manifestations of HMD would be incorrect.
- **Option B:** Similarly, this option would be incorrect if it does not align with established facts about HMD, such as its association with prematurity, surfactant deficiency, or the presence of hyaline membranes.
- **Option C:** This would be incorrect if it suggests a mechanism or association not supported by evidence regarding HMD.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that **corticosteroid administration to pregnant mothers at risk of preterm delivery** can significantly reduce the incidence of hyaline membrane disease by accelerating fetal lung maturation and surfactant production. This is a critical strategy in the prevention of HMD.

## **Correct Answer:** D.