## **Core Concept**
Conn's syndrome, also known as primary aldosteronism, is a condition characterized by the excessive production of aldosterone, a mineralocorticoid hormone produced by the adrenal glands. This leads to hypertension, hypokalemia, and metabolic alkalosis. The underlying cause is often an aldosterone-producing adenoma in one of the adrenal glands.

## **Why the Correct Answer is Right**
The correct answer, **D**, is related to the characteristics of Conn's syndrome. In Conn's syndrome, patients typically present with hypertension due to sodium retention, hypokalemia due to potassium wasting in the urine, and metabolic alkalosis. The condition is associated with low renin levels because the feedback mechanism from the high aldosterone levels suppresses renin release.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Typically seen in Conn's syndrome.
- **Option B:** Usually observed in Conn's syndrome.
- **Option C:** Commonly found in Conn's syndrome.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl for Conn's syndrome is that it is a cause of **secondary hypertension** that is potentially curable with surgery if caused by an adrenal adenoma. A classic diagnostic clue is the presence of **hypokalemia** and **metabolic alkalosis** in a patient with hypertension.

## **Correct Answer:** D.