**Core Concept**
β-blockers are a class of medications used to manage cardiovascular conditions by blocking the effects of the hormone epinephrine, also known as adrenaline, on the body's beta receptors. These medications are used to treat conditions such as hypertension, angina, heart failure, and certain arrhythmias.

**Why the Correct Answer is Right**
The maximum half-life among β-blockers is approximately 90 hours, which is a significant duration that allows for once-daily dosing. This is due to the pharmacokinetic properties of the medication, specifically its metabolism and elimination from the body. The correct β-blocker with the maximum half-life is **Nadolol**, which is primarily metabolized by the liver and excreted in the urine.

**Why Each Wrong Option is Incorrect**
* **Option A:** None provided. Please provide the options for accurate explanation.
* **Option B:** If this option is a β-blocker, it would likely have a shorter half-life compared to Nadolol, such as Propranolol (half-life of around 4 hours) or Metoprolol (half-life of around 3-7 hours).
* **Option C:** Similar to Option B, if this option is a β-blocker, it would likely have a shorter half-life compared to Nadolol.
* **Option D:** If this option is a β-blocker, it would likely have a shorter half-life compared to Nadolol.

**Clinical Pearl / High-Yield Fact**
When choosing a β-blocker for a patient, consider the duration of action and dosing frequency to minimize non-adherence and optimize treatment outcomes. Nadolol's once-daily dosing is a notable advantage over other β-blockers with shorter half-lives.

**Correct Answer: . Nadolol**