Okay, let's tackle this question. The question is about mitral valve prolapse and asks which statement is not true. First, I need to recall the key points about mitral valve prolapse (MVP). MVP is when the mitral valve leaflets bulge into the left atrium during systole. It's a common condition, often asymptomatic, but can lead to complications like mitral regurgitation.

The options aren't provided, but the correct answer is supposed to be the one that's false. Let's think about the typical features of MVP. Common true statements include: it's more common in women, can cause a mid-systolic click and late systolic murmur, may be associated with connective tissue disorders like Marfan's syndrome, and can lead to arrhythmias or infective endocarditis.

Now, the incorrect statement might be something like MVP is always symptomatic, or that it's associated with a diastolic murmur, or that it's more common in men. Another possibility is that MVP is not a risk factor for endocarditis, but actually, it is a risk factor. Also, MVP is usually diagnosed on echocardiogram.

Wait, the correct answer here is supposed to be the exception. Let me think of a common misconception. For example, MVP is often associated with a mid-systolic click, not a diastolic murmur. If an option states that MVP presents with a diastolic murmur, that's incorrect. Another incorrect statement could be that MVP is more common in males, but actually, it's more common in females.

So, the incorrect statement would be the one that contradicts these facts. Let's structure the explanation accordingly. The core concept is the pathophysiology and clinical features of MVP. The correct answer is the one that's false, like a diastolic murmur. The other options would be true statements. The clinical pearl would be to remember the auscultatory findings and risk factors.

**Core Concept**
Mitral valve prolapse (MVP) is characterized by displacement of one or both mitral valve leaflets into the left atrium during systole, often causing a **mid-systolic click** and **late systolic murmur**. It is associated with **connective tissue disorders** (e.g., Marfan syndrome) and carries a **low risk of infective endocarditis**.

**Why the Correct Answer is Right**
The false statement is typically one that incorrectly describes MVP’s clinical features or epidemiology. For example, if an option claims MVP is **associated with diastolic murmurs**, it is incorrect because MVP murmurs are **systolic**, not diastolic. Diastolic murmurs are linked to conditions like aortic stenosis or mitral stenosis.

**Why Each Wrong Option is Incorrect**
**Option A:** *If it states MVP is more common in males* – Incorrect. MVP is **twice as common in females**.
**Option B:** *If it claims MVP is asymptomatic in 90% of cases* – Correct. Most patients are asymptomatic.
**Option C:** *If it mentions MVP as a risk factor for atrial fibrillation* – Incorrect. MVP is more strongly linked to **ventricular arrhythmias**, not atrial fibrillation.
**Option D

✓ Correct Answer: C. Majority of cases present with mitral regurgitation