**Core Concept**
Tropical pulmonary eosinophilia (TPE) is a rare but severe form of pulmonary disease characterized by an intense eosinophilic infiltration of the lungs, leading to respiratory symptoms and significant morbidity. This condition is often associated with a strong allergic response to filarial parasites, particularly Wuchereria bancrofti.

**Why the Correct Answer is Right**
Tropical pulmonary eosinophilia is characterized by several key features, including:
- **Severe eosinophilia**, with eosinophil counts often exceeding 30,000/μL.
- **Pulmonary symptoms**, such as cough, dyspnea, and wheezing.
- **Hyperresponsiveness to bronchodilators**, indicating airway obstruction.
- **Elevated IgE levels**, reflecting an intense allergic response.
- **Imaging findings**, including pulmonary infiltrates and eosinophilic pneumonia.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because TPE is indeed characterized by eosinophilia, making it a defining feature of the condition.
**Option B:** Incorrect because pulmonary symptoms are a hallmark of TPE, with patients often presenting with cough and dyspnea.
**Option C:** Incorrect because elevated IgE levels are typically seen in TPE, reflecting the allergic nature of the condition.

**Clinical Pearl / High-Yield Fact**
Tropical pulmonary eosinophilia is a medical emergency that requires prompt treatment with corticosteroids and, in some cases, antifilarial medications. It is essential to consider this diagnosis in patients with severe eosinophilia and pulmonary symptoms, especially in endemic areas.

**Correct Answer: D.**