Okay, let's tackle this question. The user provided a scenario involving a pregnant woman with mitral stenosis and wants to know the maternal mortality risk. First, I need to recall the key factors that determine maternal mortality in pregnancy for patients with mitral stenosis.

The core concept here is the impact of mitral stenosis on pregnancy outcomes. Mitral stenosis leads to increased left atrial pressure, pulmonary hypertension, and can cause heart failure during pregnancy. The severity is often assessed by the mitral valve area (MVA). The New York Heart Association (NYHA) classification is crucial here because it reflects the patient's functional status.

The question states that the patient has an MVA of 1.4 cm², which is considered severe (normal is 4-6 cm²). She's in NYHA class II, which means she has symptoms with ordinary activity. The correct answer would relate to the maternal mortality rate in such cases. From what I remember, the maternal mortality rate is significantly higher when the MVA is less than 1.5 cm² and the patient is in NYHA class III or IV. However, even in NYHA II with MVA <1.5 cm², the risk is elevated. Looking at the options, the correct answer is likely 5-10%. Let me verify. In patients with severe mitral stenosis (MVA <1.5 cm²), the maternal mortality rate is approximately 5-10% if NYHA II, and can be as high as 30% in NYHA III/IV. The other options might be lower or higher, but the key is the combination of MVA and NYHA class. The wrong options would probably be 0.1-1%, 10-20%, or 20-30%. The 0.1-1% is too low for severe MS. The 10-20% might be for less severe cases, but here it's NYHA II with MVA 1.4, which is severe. The 20-30% is more typical for NYHA III/IV. So the correct answer is 5-10%. The clinical pearl here is that maternal mortality increases dramatically when MVA is <1.5 cm² and NYHA class II or higher. This is a high-yield fact for exams like NEET PG or USMLE. Also, the management would involve close monitoring and possibly percutaneous balloon valvuloplasty if feasible.

**Core Concept** Mitral stenosis (MS) with a valve area <1.5 cm² and New York Heart Association (NYHA) class II or higher significantly increases maternal mortality during pregnancy. Pulmonary hypertension and volume overload from hemodynamic changes in pregnancy exacerbate cardiac decompensation. **Why the Correct Answer is Right** A mitral valve area of 1.4 cm² is classified as severe MS. NYHA class II indicates symptoms during ordinary activity, reflecting decompensated heart function. Maternal mortality risk in this scenario is **5-10%** due to heart failure, arrhythmias, or pulmonary edema. The risk escalates further with NYHA III/IV (30% mortality) but remains lower than in NYHA II with MS <1.5 cm²

✓ Correct Answer: A. <1%