**Core Concept**
Chronic mitral regurgitation is a condition where the mitral valve does not close properly, allowing blood to flow backward from the left ventricle into the left atrium during systole. This condition can lead to various physiological and anatomical adaptations in the left heart.

**Why the Correct Answer is Right**
Chronic mitral regurgitation typically results in left atrial enlargement, left ventricular dilation, and increased workload on the left ventricle. These adaptations can lead to symptoms such as dyspnea, fatigue, and palpitations. The left ventricle may also undergo hypertrophy to compensate for the increased volume load.

**Why Each Wrong Option is Incorrect**
* **Option A:** Left atrial enlargement is actually a feature of chronic mitral regurgitation, as the left atrium must accommodate the increased volume of blood flowing back into it.
* **Option B:** Left ventricular dilation is also a feature of chronic mitral regurgitation, as the left ventricle must accommodate the increased volume of blood flowing back into it.
* **Option C:** Right ventricular hypertrophy is not typically a feature of chronic mitral regurgitation, as the right ventricle is not directly affected by the mitral valve dysfunction.

**Clinical Pearl / High-Yield Fact**
Right ventricular hypertrophy is more commonly associated with conditions that directly affect the right ventricle, such as pulmonary hypertension or right ventricular outflow tract obstruction.

**Correct Answer: C. Right ventricular hypertrophy.**