**Core Concept**
The bronchopulmonary segments are the functional units of the lung, each receiving its own branch of the bronchus, pulmonary artery, and pulmonary vein. They are essential for understanding lung anatomy and pathology, particularly in conditions like pneumonia.

**Why the Correct Answer is Right**
The right lung is divided into three bronchopulmonary segments (upper, middle, and lower lobes), while the left lung is divided into two segments (upper and lower lobes). Each segment is supplied by its own segmental bronchus, pulmonary artery, and pulmonary vein, allowing for independent ventilation and perfusion. This segmentation is crucial for the diagnosis and treatment of lung diseases, as each segment can be affected differently.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the number of bronchopulmonary segments in the right and left lungs.
**Option B:** This option is incorrect because it does not specify the correct number of segments in the right and left lungs.
**Option C:** This option is incorrect because it does not accurately describe the bronchopulmonary segments in the right and left lungs.

**Clinical Pearl / High-Yield Fact**
The bronchopulmonary segments can be remembered using the mnemonic "3-2-1" for the right lung (3 segments in the upper lobe, 2 in the middle lobe, and 1 in the lower lobe) and "2-1" for the left lung (2 segments in the upper lobe and 1 in the lower lobe).

**Correct Answer: D.**