**Core Concept**
Viral pneumonia primarily involves interstitial inflammation and features such as bronchiolitis and multinucleate giant cells, reflecting viral replication and immune response in the airways and lung parenchyma. Unlike bacterial pneumonia, it typically does not show a dominant alveolar exudate.

**Why the Correct Answer is Right**
In viral pneumonia, the pathologic hallmark is **interstitial inflammation** due to viral infection of epithelial cells and subsequent immune cell infiltration. **Bronchiolitis** occurs as viral infection spreads to bronchioles, leading to inflammation and mucus plugging. **Multinucleate giant cells** form from fusion of epithelial or macrophage cells, a classic finding in viral infection. However, **alveolar exudate is not predominant**—instead, alveoli remain relatively spared, and exudate is minimal or absent. This contrasts with bacterial pneumonia, where alveolar exudate is abundant.

**Why Each Wrong Option is Incorrect**
Option A: Interstitial inflammation is a key feature of viral pneumonia and is consistently observed.
Option C: Bronchiolitis is a common finding due to viral infection of bronchial epithelium.
Option D: Multinucleate giant cells are pathognomonic for viral infections, especially in bronchiolar walls.

**Clinical Pearl / High-Yield Fact**
Remember: Viral pneumonia shows **interstitial predominance**, **bronchiolitis**, and **giant cells**, but **not** a predominant alveolar exudate. This distinguishes it from bacterial pneumonia, where alveolar exudate is abundant.

✓ Correct Answer: B. Predominance of alveolar exudate