**Core Concept**
Mitral stenosis is a valvular heart disease characterized by the narrowing of the mitral valve orifice, leading to an obstruction of blood flow from the left atrium to the left ventricle. As the severity of mitral stenosis increases, various hemodynamic changes occur, affecting the heart's structure and function.

**Why the Correct Answer is Right**
As mitral stenosis worsens, several clinical manifestations become more pronounced. One of the key consequences is the development of pulmonary hypertension, which is a direct result of increased pressure and resistance in the pulmonary vasculature. This occurs due to the backflow of blood into the left atrium, causing an increase in left atrial pressure, which in turn leads to increased pulmonary venous pressure and eventually pulmonary artery pressure. Additionally, the increased pressure load on the left atrium can lead to left atrial enlargement and potentially to atrial fibrillation.

**Why Each Wrong Option is Incorrect**
* **Option A:** **Left Ventricular Hypertrophy** is actually seen in conditions like aortic stenosis or hypertension, not mitral stenosis. In mitral stenosis, left ventricular function is often preserved until late stages.
* **Option B:** **Right Ventricular Hypertrophy** is indeed seen in mitral stenosis as a consequence of pulmonary hypertension.
* **Option C:** **Tricuspid Regurgitation** can be seen in conditions with elevated right ventricular pressures, like pulmonary hypertension secondary to mitral stenosis.

**Clinical Pearl / High-Yield Fact**
In patients with severe mitral stenosis, the characteristic "opening snap" of the mitral valve can be heard on auscultation, followed by a mid-to-late diastolic murmur.

**Correct Answer: A. Left Ventricular Hypertrophy.**