**Core Concept**
Postural (orthostatic) hypotension is a condition characterized by a significant drop in blood pressure upon standing, leading to symptoms such as dizziness and fainting. This condition can be caused by various factors, including dehydration, autonomic dysfunction, and vasovagal syncope.

**Why the Correct Answer is Right**
Graded compression stockings are an effective treatment for postural hypotension. They work by compressing the veins in the legs, preventing blood from pooling and reducing the venous return to the heart. This helps to maintain blood pressure and prevent dizziness upon standing. The compression also helps to promote venous return, reducing the pooling of blood in the legs and increasing blood volume in the central circulation.

**Why Each Wrong Option is Incorrect**
**Option A:** Fludrocortisone is a mineralocorticoid used in the treatment of primary adrenal insufficiency and orthostatic hypotension. However, it is not the first-line treatment for postural hypotension, and its use is typically reserved for patients with underlying endocrine disorders.

**Option B:** Salbutamol is a beta-2 adrenergic agonist used primarily in the treatment of asthma and chronic obstructive pulmonary disease (COPD). It can cause vasodilation and potentially worsen postural hypotension, making it an inappropriate choice for this condition.

**Option C:** Beta-blockers are used to manage hypertension, angina, and certain arrhythmias. They can worsen postural hypotension by blocking the beta-2 receptors in the blood vessels, leading to vasoconstriction and decreased blood pressure.

**Clinical Pearl / High-Yield Fact**
When managing postural hypotension, it is essential to consider the underlying cause and address any contributing factors, such as dehydration, autonomic dysfunction, or vasovagal syncope. In addition to graded compression stockings, other treatments may include increasing fluid and salt intake, elevating the head of the bed, and avoiding prolonged periods of standing.

**Correct Answer Line**
✓ Correct Answer: A. Graded compression stockings.